File for legal separation. It's pretty likely you and the kids will be allowed to remain in the house and he will have to go elsewhere.
All the nicey-nicey has to stop at some point.
"Asking him to consider detox," (?) There needs to be some protection for the small children: they cannot protect themselves. Him being allowed to stay at home drunk with small children is a recipe for tragedy. Asking him hasn't worked and it won't work now. His brain is fried, he cannot make good decisions. It's going to get worse if he doesn't get away from the alcohol and he's not going to do that while living with you, so it's on you to force the issue. Not a perfect scenario, but it is the cards you have been dealt.
Many hugs. You can do this. You're doing it all already, and having him out of the house is going to make your daily life much more peaceful and productive - and the kids will be safe. They HAVE to be your first priority.