Tools- I guess I'm the one that's crazy

wait a minute, are you are renting a storage place to keep his stuff in? I would agree that he can get his own place to store it, let him rent a storage shed or something... you are going above and beyond to keep his stuff it at your place, even more than that if you are renting somewhere else to keep it.

all that said, sometimes with family, we do things to take care of the relationship that others shake their head at us and tell us we are nuts and should not put up with it.