CareTooMuch,
I know I'm late to the party but I just wanted you to know I've been thru something similar. My father and I were very close since my mom died when Difficult Child was an infant, and thru all of his issues, we had a falling out as well. Dad wanted to put Difficult Child 'away', like in a mental institution for life or something, and offered to pay for it. I was getting some really weird and anxious vibes from him, apparently he was at the end of his rope with it. Well I found somewhere that would take him for 3 months, but cost 50K. My dad freaked out said some horrible things, suggested we sell our house and all of our cars to finance this rather than ask him for money.
Anyway that was several years ago and we didn't talk for months and I have never really talked to him about Difficult Child again. His health has taken a turn for the worse, he was diagnosed with dementia over a year ago. It is very sad to lose a support that you relied on.
I have found that most people cannot handle the daily ins and outs of what we deal with. They are scared and become judgmental because they don't want Difficult Child to be going thru this or us. It is difficult for people to be powerless to help when they care. But it is something we live every day. Such a lonely existence. HUGS.