(((SBD))) - you aren't kicking him out, IMO, you're letting him deal with the consequences of his actions. I'm an RA and a recovering codie..know both sides all too well.
I am almost 50 and living "back home" because of the financial consequences of my addiction. The rules are simple..work, going back to school, and no substance abuse. I make the decision every day...I choose recovery.
That being said, if it weren't for my loved ones letting me deal with my consequences? I'd probably be dead or still out on the streets.
Major hugs and prayers, as I know this isn't easy,
Amy