Haroun feels startled, honored, trusted, and unworthy, in roughly that order.  People have been killed for a lot less than 16 mithril.  "If I survive you, absolutely, and I'll leave instructions for my parents to do the same if I don't."

"Cool, thanks. He's my next of kin." She points at him.

The day's last light is fading quickly, as Haroun and Bella exit the Guild building and pick up their carriage.  Haroun observes that merchants tend to flee the coming of night; if Bella wants to shop tonight, she may need to do some of that quickly and before they find an inn or eat dinner or shower.  Shop, or find inn?

"Change of clothes - I will settle for pajamas if we find a store with pajamas first - then inn." She has her money bag inside her backpack on the grounds that locals do not know how zippers work and against someone of ridiculous pickpocketing skill that might be more defense than putting it somewhere she'd expect to feel it moving, but when she had to take her shoes off for the ring anyway she stuck a couple platinum in there.

Cowcorn is a large enough city to have a specialized pajama store!  Navigating there with the carriage is a bit unwieldly, but Haroun knows how to stick to carriage-navigable wide arterial streets.  He's home now.

The pajama store does not have quite the selection of such Earthly clothiers as Isabella Swan was once accustomed to shop at.  She can choose between Pajama Style 1, Pajama Style 4, or Pajama Style 6, if she wants to immediately wear out something in roughly her size.  One ordinarily has pajamas custom-tailored, which takes a few hours even for a high-level Tailor.  Haroun looks abashed for not thinking this through earlier, and notes that if Bella wants to upgrade to magical tailoring, she can get some nice magical pajamas immediately by paying gold instead of silver.

"I don't want to spend stupid amounts of money on magic pajamas. I will consider being spendier when I'm picking things to make an impression but these are pajamas." She will take a Pajama Style 4 in blue and be on her way.

It's getting dark fast.  Haroun spots an inn with a silver-gilded sign that means that hot showers and clothes-cleaning services and tasty food will all be in the offing, and proposes that they get a couple of rooms there for the night.  It's a strange thought to him that Bella doesn't really need to worry about money anymore, not for a long while.  Maybe not ever, if her otherworldly luck holds out.

Bella is happy to accept his inn suggestion and get dinner there and change into her pajamas and put her daywear in the inn laundry and go to bed. In the morning she collects the daywear, puts it on, and prepares for a more elaborate shopping trip.

Haroun feels a certain quiet dread.  But no, Bella isn't like other girls.  She won't do what other girls would do if they suddenly had 2 mithril in petty cash to go shopping, namely try on 2,304 outfits and make him carry all of the resulting weight.  Surely not.  He's not even her boyfriend.

"I think maybe real estate first? So I know if I'm also buying furniture or not, and can prioritize? Where's the school, I might as well optimize hard on location to save search time since I don't have to economize too hard."

School is where the giant bone-white towers rise up like tusks.

Real estate agents... are not quite a standard profession in Cowcorn city.  One would, perhaps, inquire of one's merchant friends, who would inquire of others, and by word-of-mouth a recommendation might reach you.  You could also walk around the perimeter of Cowcorn academy seeking for-sale signs.  Or look for a more upscale version of an inn, in the same area, to bide a week or two.  Haroun also knows where the wealthy children on campus have their dorm-mini-mansions; temporary housing could be sought there.

If for-sale signs are a done thing she will start with the perimeter walk, as much to learn her way around as anything else, but if that doesn't turn up anything promising a "mini-mansion" might be about right.

For sale, old and busted.  For sale, new and busted.  For sale, new and shiny and conveniently located next to an incredibly seedy-looking brothel with included sound effects.  For sale, old and busted.  For sale, old and busted again.

For sale... hmmmm?  This looks interesting.

Knocking on the door produces an answer from a man in his apparent late thirties, bearded and short enough to suggest dwarven ancestry if that's a thing here.  He identifies himself as Laston, and affirms that he's watching the place for its owner and seller, a B-rank Adventurer.  He is authorized to make over the deed at the Guild Bank, given a good offer.

"This one's cute," she says of the ivied house with its wildflower yard and interesting windowpanes, distinct from its not-for-sale neighbors mostly by being a different color of brick under all the ivy and different stain on the roof shingles. "Can we see inside?"

He gives her a measured look, running a mental calculation that concludes with him definitely being able to subdue one tinplate Adventurer plus one academy kid, in the event of trouble.  Even if she has an unusually shiny scabbard for her sword.  "Of course," he says smoothly, as if this question was never in doubt.

In she goes. It's tasteful - no festooning of precious metals where precious metals need not be. The walls dare to be colors, often several of them in the rooms with paper instead of paint; the light fixtures are fanciful rather than opulent. There's plenty of room everywhere, even with the furniture included - "Is the furniture included?" - and plenty of air and plenty of light. There's a breakfast nook and window seats and walk-in closets in the bedrooms and, of course, various magical amenities.

Furniture can be included... for a price!  Don't worry the price isn't your soul.

Magical amenities include:

An enchanted hot water system that probably accounts for much of the price of the house.

Red-glowing crystals for nighttime, both inside the house, and outside on the grounds.

Windows in the master bedroom that will opaque or clear upon a command word being uttered.

A Tamed Crystal Slime that roombas the carpets.

A magical picture-frame that can store pictures of up to fourteen previous events that took place before it in the dining room.

Wardrobes that ward off moths, even powerful magical moths bent on consuming powerful magical clothing.

A magical array currently powering a set of dirt-simple magical-communication stones that can cause the stone at the other end to flash once, connected to local businesses that will deliver up: laundry service; six particular premade meals the previous owner enjoyed (and the corresponding restaurants could be told to reinterpret those signals); a stone that can go back to the brothel that owns it, unless Bella would like to explore that area of existence; a seller of alcohols; an emergency cleaner; emergency fire response; emergency medical response; emergency military response.

The existence of the stones is interesting but Bella pretends she's politely scandalized about the brothel part instead. How much does the house cost? (With and without furniture.)

Polite scandalism seems lost on the seller.  The house can be hers for... ONE MILLION DOLLARS.  Or ten mithril, said in about that tone of voice.  Naturally that doesn't include furniture.

Wow she was totally wrong about how much houses cost! Or bread is not a good benchmark. Or this house corresponds to a much nicer house back on Earth than her mom's house, actually, that's probably a lot of it. "I assume there's some procedure to get the money out of my Guild Bank account but I've never actually bought a house before," she remarks.

"I think for amounts like that, they transfer ownership between Guild accounts rather than bringing out the money.  You'd get the Bank's assurance the deed was real, as well.  And this is not a ten-mithril house."

"I don't know what houses cost! I was thinking it was about triple my estimate but my estimate is based on very shaky assumptions."

Haroun makes a show of looking around the room again, and winks at Bella when, he thinks, he's at an angle Salesman Laston can't see.  "Half a mithril," says Haroun.

"Half a mithril?  If you're not serious, boy, get out of this house and let me talk to the real Adventurer here."

"Ha!  You get out of the house, then.  I'm pretty sure half a mithril was within a closer factor of a sane price than ten mithril."