So if your asking our opinion on whether or not the JW should let the DF'd guys stay in his house, I'd say yes he should if that's what he wants to do. The congregation 90 miles away shouldn't be a problem, but he'll have to figure out what to say when one or more of the local JW's notices someone is staying with him.
Since the DF'd guy isn't a JW anymore, he could be passed off as a "worldly" friend (which he now is) who had shown "interest" in the past (which he once did) and is now in need of temporary help.