The slightly longer version is:
-Andy is schizoaffective, but neither incompetent nor incontinent; and merely unwilling to care for himself, not unable. That precludes nursing home or long term care placement.
-He has no developmental disabilities, so he's not eligible to be placed in a group home. That also precludes him from receiving home healthcare aides.
-He can't be left in a hospital because there is nothing medically wrong with him, and he'll demand discharge anyway.
-If you try to place him in a shelter, rooming house, halfway house, or motel, he'll call ahead and insist he needs extra care, so he can claim that they refused him, not that he refused them. Even if they don't refuse, he will lie. If you put him in a motel, he literally shits the bed.
-He has no friends to couchsurf with. He has no money and can't drive, so he can't live in a van. He's too soft for street homelessness, and will walk into the street crying, so he gets picked up and taken to the hospital.
-From there, he will cry "Unsafe discharge! Wanna go to park bench!". He then get dumped off at his legal address, which was Tawm and Mawm's until the Exodus.
-If Tawm didn't let Amby in, he'd break in, smashing windows or breaking locks with his massive bulk.