Worst case scenario is the house is unsalvageable and everything in it is worth nothing. Chris has no fandom support structure anymore because of something he did, so helping him make money is not an option. The mortgage Barb has gotten against the equity of the house has a rate or a value that far exceeds what it is worth. The bank takes the house.
Chris will still earn a lot on SSD-I and it'd really be quite easy to just find an apartment for him nearby. He'd probably end up paying less than he's paying now to Barb to help with the fires she's started, especially if he gets on Section 8.
It's not a dire situation. He will never be homeless. He will never be on the street. There are darker scenarios that involve a criminal record or other problems that bar him from living on his own, but at that point it's out of my hands anyways.
Chris's life will improve when Barb is gone. I think he knows this.