I second all the wonderful and heartfelt thoughts and wishes given to you.
You and your AH are adults, the kids need the protection from the result of having an A dad, and you are that for them.
The stress of waiting for him to kill or maim someone whilst drink driving, is something I still recall with horror from 20 years ago with my then AH, and would not wish on anyone.
Maybe you need a counsellor's help to sort out what you want to do, and how to handle all the different folk involved....AH, children, other family, friends eg, and the issues as well. It could be difficult leaving him, or him going...but consider him staying and later serving time (plus all the strain) for DUI or harming others, and losing what you have in law suits anyway.
I wish the best for all of you.
God bless