Are Stray Cats A Good Idea?

Sounds like it is an abandoned &/or lost pet. Typically, strays like that have less problems adapting to houses with other animals in my experience. It's certainly not a hard and fast rule, just something I have noticed. And definitely try to give him a room without other animals for at least a few days, maybe a week. And let him get comfortable and meet everybody slowly. Good luck, and keep us posted!