@honeyandbutterontoast
You're putting a man who doesn't want a future with you before your emotional and financial wellbeing and that if your children.
You already took less than you were entitled to in the divorce.
You need to have some counselling to get to the root of why you think men's wants come before women and children's needs.
It's very unhealthy behaviour.
He's minted and the money he put in is literally legally a gift. He's financially absolutely fine.
He is married and doesn't want that to change or he would have left. He's emotionally absolutely fine.
Your inaction is only damaging you and your kids.
Why not try what I suggested upthread and block all contact other than one new email address, to discuss anything necessary legally, then once the house is sold, block that too?
I suspect your inaction isn't driven by guilt or feeling it would be 'wrong' to sell up. You don't want to block him because you don't really want it to be over. But it never started in the first place.
I'm being brutally honest because you are wasting your life on someone who doesn't care about you or your children.