Hi Janie,
Having a plan is great! Setting aside money, opening your own account, getting all your important papers in a safe place (birth certificates, etc.) are all things that should, perhaps, be considered...
I'm afraid I don't know if all later stage alcoholics don't eat, but my stepson had very little appetite at one point. I've read here on SR that the alcohol consumed takes the place of the calories they would normally eat, and some alcoholics once they quit drinking crave sweets.
So, any chance you could sleep on the couch so you wouldn't get beaten up in the night? Better yet, any chance HE could sleep on the couch?