This was my boundary with my X. My Lawyer didn't like it but it worked:

H:"W, I do not want the house. I will move out of the house as soon as we have a written 50/50 parenting plan"

She had like 90 days to refi the house in her name. If she couldn't qualify, I had the option. Otherwise we were to sell house.

"What is best for my kids is best for me"
Amor Fati
Link to quotes: https://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2879712