Want the house, pd 107k, bal 89k, $30 put in, want to keep till daughter 18, then pay him when I sell or refi. What to offer?

You would present that to him, just as you did here. You guys are free to agree to whatever you want. If he doesn't agree, then you might have a problem because your daughter is young so it may be difficult to get a court to tie up his share of the house for that long. If there are other assets, or you can take less in alimony or child support, perhaps those can be incentives? Talk to your lawyer about how to negotate or what the best case and worst case situations would be for you. Good luck!