Married to my boss. Feeling trapped in this life😥

I'm so alone and I don't know what to do. My husband owns his own business and works a MINIMUM 12 hours a day, 7 days a week. The kids (2 and 1 years old) never see him, I run the paperwork end of the business so I'm forced to wait til he gets home to do my work (which often takes me all night to do while he relaxes/sleeps) which at this point he doesn't even appreciate anymore, "moms are supposed to do everything" he says "my mom ran the family/company without any help so you don't deserve any" (she has severe anxiety and is "functional alcoholic" because of the stress).

I sometimes day dream about quitting, getting a divorce, any other scenario in which I live a different life.

This business was passed down to him from his father and mother therefore he has made it clear to me that quitting and divorce are not part of the legacy...

Edit: I have family but they're not in a position to help. My dads in jail, my mom is on assistance from the government and living in a one bedroom apartment. That's why his life and family seemed so magical at first. He also wasn't always like this, we used to be best friends until his father handed over the company 3 years ago.