None of the choices ahead of you are pleasant. I had to draw a line with my brother some years ago about money and a place to stay. Seeing what you're up against I'm awfully glad I never let bro get his suitcase in the door, even though I felt horrible about it at the time (despite knowing my decision was right--he took and still takes people down with him, and I finally chose not to be one of them).

I don't envy you one little bit. Sending a few hugs your way...