Hmm. It's a useful list, it lets him put people on monitoring all of those people's interactions with computerized systems they can watch from here, but it's not enough to guess at what they're doing.
There is, unsurprisingly, no security camera that happens to look directly at the house and its driveway. There is, according to the maps, a pawn shop across the street. Probably they can either send another FBI agent, or make a request to the local police department, and have a security camera put there to watch suspected criminal deals their lead says are happening out front at night, and a camera placed to cover the door and sideway will happen to catch images of the house and its driveway. Hopefully without that fact being at all notable to the Andalites, though this is taking more of a risk if they're bugging everything nearby.
...What he wants next, Visser 3 decides, is to get someone from Anchorage and slip a Yeerk into their head, but - temporarily, and without causing suspicion. There are a few different storefronts and restaurants near the house being rented, and they have employees. It's very possible said employees are local allies, but - the Andalites are likely somewhat picky about that, try to only recruit trustworthy humans and such. Can he get a list of store employees from the establishments, and then narrow it down to people who are in debt or have very bad credit scores? (Since they have those records anyway...)
Once they have that, he would like to call one of them up and offer them an all-expenses-paid vacation to a tourist destination near DC, which they "won" by [pick something related to a car they've purchased or something.] This is a thing human companies do sometimes for advertising, for some reason, and a human without a lot of money in a dead-end job will be less likely to question it.
If they get any takers, they can book them a flight and make plans. The humans on Earth have drugs used for surgeries that reliably cause amnesia. A Yeerk can still get information from a human brain if they're under sedation, as long as they're not totally out. They can stage an 'accident', or maybe just have the lucky winner be very drunk first, by including a free bar with their vacation. And then, even if they are reporting to the Andalites, he can send them back afterward without much grounds for suspicion. (And maybe bug them, at that point, with Yeerk recording equipment which is much harder to detect, but he'll need to decide whether to risk that.)
It's roundabout and not the best way of getting information, and it's a bigger expenditure of resources, but it hopefully won't give his investigation away.