My situation is similar as well, AH manages his own company and we're financially very sound. He drinks mostly in his car by himself, no longer with friends since I let most of his close friends (all married men) know what has been going on. From the outside, our lives look very shiny and perfect. Two cute, healthy kids, long committed relationship, vacations twice a year, nice cars, clothes, etc. I'm a SAHM but I have a degree in accountancy and could go back to work support myself and our kids BUT I just don't want to share custody with him if he isn't sober and committed to recovery. I don't want our kids exposed to an alcoholic parent without me there to protect them, especially since one is 2 years old and the other is 4 months.
Thankfully, AH is at his 3rd night of AA and I'm cautiously optimistic that he'll stick with it.