Good for you for trying to put the kids first. Let me tell you about my parents' divorce, because it was the friendliest I've heard of, and it SO helped my younger sister and me.
They continued to co-own the house until my sister got out of High School so that we could continue with the same school (she was 12 at the time). Dad gave mom half the house payment every month. Once my sister graduated, Dad had the first right to buy our mom out and keep the house, to let her buy him out, or they could sell and split the $$. He considered it an investment, rather than any part of alimony, and did eventually get his $$ back. This means he also continued to pay for any upkeep of the house, including helping to put in a brick wall when the wooden one finally gave up the ghost. (This did tick off my step-monster something fierce, but it added to the value of the house and he did get it back when they sold. So whatever.)
He also paid good child support, but did not pay any alimony. If my sister and I had any extra for choir, band or a sport, Dad helped pay that cost too.
My parents continued to support each other in parenting, so that my sister and I couldn't play them against each other (continued that "united front" that you have to have with the kids). And neither EVER bad-mouthed the other, which I think was crucial.
Looking back at other kids and how they had it, I can't tell you how wonderful my parents' attitude was. It made the divorce much easier to handle.
Good luck; I hope your soon-to-be-ex is as thoughtful as you obviously are.