Hi Suzanne,
I ended up with a wild bun because my (now ex) husband found him near a busy highway, caught him and brought him home. I don't think he put too much thought into why he was trying to catch him and what he was going to do with him.... but I'm glad he did. He brought him (Binky) home and I instantly fell in love and did hours and hours (and days and weeks and years) of research on rabbits. I've never had one before and knew nothing about them! I thought he was a domestic (he looked like some I saw in a pet shop) but my vet confimed he was wild. My vet also didn't try to talk me out of keeping him, he thought it would be great to keep him as a pet but he did advise me to give him a bolt hole to feel safe. No matter where he is I make sure he has somewhere to hide - very important! I've had to section off a room because I have four rabbits and none of them are bonded yet. Binky has a space that is 8x4 and he seems fine. I don't know what to tell you about how much space a rabbit (wild or not) needs because I have the exact same worries as you! Binky use to run freely through my whole house but as I keep finding stray rabbits his area becomes smaller. I am always worrying about my rabbits and whether they have enough room, but then I put it into perspective by thinking their lives are a lot bettter than if they weren't in my home! Oh, and a word of warning, wild rabbits can jump VERY high. Binky climbed the inside corner of a brick wall to the CEILING by using the bricks as steps when he was frightened by a dog barking! Just letting you know so you don't find Spudsy somewhere he shouldn't be! Best of luck with it all and let me know how you go!