Now I can hear you breathe...
I think moms think the same way....you are already foreseeing the future of "when he gets out."
I still think sober living should be an option. He has opportunities for support; sobriety; and self sufficiency to build his confidence. He will need this on the outside. He will need to build himself up and gain confidence as a man.
Doing it in your home hasn't worked. You can still be supportive for the sober adult but from a distance.