OP,
Have just read this thread again.
Please listen to @RandomMess excellent advice.
He is utterly consumed by himself.
He cares not a whit for anyone but himself.
He will try a mess you around financially and bring the whole house down just to drag you with him.
Please stop trying to fix and organise his life.
Focus on the legalities of protecting yourself and home.
Get it on the market and contact your solicitor and bank as to his intention to default deliberately on morgage payments.
More abusive behaviour.
One thing to warn you about is to NOT take ANY responsibility for his relationship with his children.
Do not be sucked into feeling you have to parent him and them.
You need to make it completely clear to him that how he behaves, and his relationship with his children are his responsibility.
If he wants to make things harder with the house, it will be ALL on him.
He is a very bad person.
He deserves everything coming to him.
You sound like a wonderful woman and mother.
Your life is going to be so much better soon.