Bad idea? Or reasonable?

So my EX fiancé and I broke up after he came home drunk and shoved me.. he has never been violent towards me, even though he has a severe addiction to alcohol and other substances.. obviously, I called the cops and he got arrested.. thing is he was on probation for another crime.. that one really wasn’t his fault.. we can home and our neighbors were having a party and he asked them to get off our lawn and they bum rushed us both.. after HE got hit, he hit back.. anyways, he was charged with a misdemeanor instead of a felony.. other guys got off completely because they had someone who wasn’t even there testify..

so here is where it gets tricky.. I made it very clear I have no intentions on getting back with him unless he goes to rehab and counseling and then MAYBE I will THINK about getting back together.. he respects that.. well he is facing up to 10 years in jail.. I am a STAHM and he owns his own business.. he makes a lot of money.. and while he was in jail, his mom took complete control of all his money and I was left completely homeless (we were in the process of moving out) with our kids.. she took everything out and claimed it was for the lawyer but she took out almost 5x the lawyer fees..

SO he is suggesting we get married as soon as possible so that I have legal control over all finances, his property, his business.. in case he does go to jail for 10 years I at least have something to get myself on my own 2 feet..

I brought it up to my 2 friends and one said that’s a great idea and the other was torn..

thoughts??