PPGA, I've been keeping up with your story. I'm sorry you and your family is struggling through this.
While I've been reading a thought came to mind. Can you have power of attorney (or something to like that) over him? To be able to make decisions for him and get him into a place somewhere? I know you said there's a small window of opportunity where he cooperates maybe that could be a solution? Since he's "not of sound mind" he needs someone to make the necessary decisions for him.
I don't know. It was just a thought.
Sending (((HUGS))) and strength to you and your family.Me - BS, 39 (I'm not old...I'm vintage)
Two Wonderful children - DS10, DD7
Him - (Doesn't matter)
D-Day June 12th 2008, D-Day #2 Sept 28th
D-Day #3 Feb 15th & 16th 2010, D-Day #4 Nov 29th 2010