Barb won't have any say in how the system handles it, probably. If there's credible evidence against Chris, the first thing they'll do is assign a guardian ad litem to Barb. Assuming everything that's being claimed is true, the GAL probably recommends a full order of protection against Chris, and moving Barb into an elder care facility since she can't take care of herself and 14 BLC isn't fit for human habitation. The care facility would probably take ownership of the house (if Chris isn't on the deed, last time I looked he wasn't) and use that and whatever SS/Medicare she gets as payment.
If they file charges, Chris is probably sent to inpatient facility for 6 months to determine if he's fit to stand trial. Who know where it goes from there. If they decide it's not worth it to file, Chris just ends up homeless, living off the tugboat, and unable to contact Barb. That's probably the best outcome he can expect.