X he said he will pay mortgage and I pay everything else. Him paying mortgage instead of child maintenance
Novemberrrain You must get a solicitor.
This arrangement he suggests would leave him still, presumably, the owner of the house, paying the mortgage so you can live in it. But in the end, he would own the house, and he wouldn't!
Take no notice of the posters telling you you have no claim on the house. You are married, you have looked after the household and his kids for 7 years.
The courts will start from the pov of making sure their is a roof over the kids heads and that each party has enough to survive. You will be entitled to half the assets - pensions, savings, value of the house (probably more than half the value of the house because of housing the kids) ...AND , if he earns enough, maintenance.(He will also be entitled to half your assets, of course - everything is looked on as a marital asset).
Tell the Solicitor what you contributed and brought to the marriage - savings, wages, your inheritance etc.
It will be far easier to do things through a solicitor. He sounds abusive - stopping you working etc, and if you have a solicitor you don't have to do the arguing with him.