And after that, he will return to looking for food, drink, and people. 

The kitchens' cabinets have plenty of uncooked ingredients, some familiar to him and some not, and alcohol isn't hard to come by either. The kitchens also have faucets, if he wants to drink water instead.

As long as he stays inside, he doesn't find anyone else.

Drunkenness inspires him to experiment with the faucets until he discovers how they work, which is a pleasing result. He uses the chance to wash his face and hands as well as to drink something other than spirits. 

He could spend several weeks quite happily living this lifestyle of sleeping on floors, pissing in gardenbeds and looting kitchens, if he's quite honest. It's relaxing, and he's putting on weight for the first time in basically as long as he can remember.

After a couple of days, the Hearthkeeper shows up again.

"Hello. Do you still believe yourself to be hallucinating?"

"I suppose not. Your damn house doesn't make it easy, though, there's no logic to it." 

"There is a logic to it, it's just not obvious. Nor is that logic in any way sensible. It hasn't been worth my time, so far, to iron out that particular behavior."

"Do you expect you will, in the future, habitually get yourself as drunk as you have been recently?"

"Uh, probably? Is there a shortage of spirits?" 

"There is not. However, I have some concerns about how you will behave yourself around my other guests if you are usually this intoxicated. It's also likely bad for your health, although I don't know how well generalizations about that apply to your species."