Hmmm...I would have to say I am better off with not that many. I know that when we were having problems at my parents I called the DNR and they were really great about giving me advice on extraction of them and how to relocate them. Only once did the DNR actually have to go out to their house and remove him. Come to find out he was a dangerous little one that they didn't recommend we handle.
House remodeling seems to attract them and mice. All those little places to sneak in. At least it hasn't gotten cold yet that they are coming in from the fields. The old foundations seem to be the ones they get into. Any chance a sealant foam in the cracks would work?