I dont think minors should be allowed, most of them will be in school anyway and still have chances to recover, there are dedicated services for that sort of thing.
I understand there are exceptions to this, but even if for purely legal reasons this seems reasonable.
For mental problems it would be good to have a certified psychiatrist on board.
Someone you can trust, i dont know if someone here has a psychology degree.
Ofcourse if this isnt taken too far then might well just be a hotel or so from a legal aspect, so certain problems might not even be applicable if they dont get out of hand.
Theres probably not too much trouble to be caused if people with serious mental problems keep taking their pills, most would be grateful and happy to be with others im sure.