Sorry you are going through this
I don't have any answers for you as I am the one that had a drinking problem in my relationship but I do know that tough love didn't work for me.
And I also know that I had to be the one who really wanted to stop drinking, I couldn't do it for anyone else but myself.
I really hope your hubby has hit his rock bottom now and he can truly accept that he needs to stop drinking. He has to want a better life more than drinking.
Inpatient treatment won't work unless he really wants to stop, unfortunately it takes some traumatic experiences for that 'want' to kick in.