It's an unofficial but accepted practice that whoever remains in the marital home whilst it's being sold will pay their half of the mortgage. They also should pay the other parties half of the mortgage as 'rent' as that party are not benefiting from living in the house but own half.
I believe it's not technically the law, it's how the law is interpreted to be fair to both sides by a family court judge.
Bullies want everything.
You should be entitled to 50% of the equity in the house. A percentage of his business. 50% of any pensions and savings he has. Spousal maintenance for a short period of a few years until you can get back to work/ on your feet. And child maintenance at 10% of his wages/ income. This can carry on for each child until the year the youngest finishes university.
This is your base line. It's hard when you are scared. You are fighting for your future needs and The needs of your children. Get a SHL to do the talking for you. Don't settle because you are scared. Go get a second opinion, take it to family court if you have to. It's expensive but a good lawyer will get you more of your share. Costs can be awarded to your ex to pay.
You won't get a free half hour with a SHL! They don't need to use that method to get clients.
it may not be too late to stand up to this bully. Usually bullies realise that if you take it to court and you stand to gain your fair share, they back track very quickly.
I was once told that out of 100 divorce cases where the bully is 'in charge', once faced with a SHL only 1-2% ever get to court.
Well done for leaving, you are stronger than you know.