At some point I considered taking in a roommate, and posted about it on the bipolar forum. the most sound advice was NOT to take in your buddies from the locked unit...

sorry this is not helping to disassemble your current arrangement, but at least heed the warning (the lady who posted had lots of experience with subletting) next time around - a psych unit is not the best source of tenants.

I am yet to sublet a room, but if I do, I will look for a working professional with a good credit history etc. Plus, they are at work most of the time.