>The first mistake he made was not seeking assistance after the stabbing incident
Sadly I found no assistance. I clarified some things about the surgery decision in another comment that may enlighten you.
>going homeless was the only option
No friends, no family. I have a brother who graduated Harvard Law under Dershowitz and worked for Weinstein. My younger brother. He called the police to tell them I was suicidal and they showed up at my ex-girlfriend's house to haul me away. (I was not, and have never been suicidal).
Sadly for me but luckily for you, you have much more support.