Follow your instincts - as a rescue person, you've got the sensitivity to know when a home is right or not.
While jazzcat has a good point about her roommate, she also knew that person really well.
You have to make a decision on someone you don't know well and is giving off mixed signals.
Whenever people sound like they are "shopping" for a cat, it makes me uncomfortable. Rescuing an animal isn't about finding perfection in the "bargain bin". Its about saving the life of an animal in need, no matter what it looks like.
There's the Tribe's two cents worth.