Most of the time when a divorce happens the wife comes out with much less than she had during the marriage. If she was a SAHM she is suddenly out looking for work that will pay the mortgage, car payments, utilities, and any other expenses that come along with being a single parent.
If the custody is 50/50 no one pays child support, no one takes the slack on medical bills, if one doesn't pay their half the doc just sues both parties, they are entitled to their money, if the father does not want the mother to put the kids in child care she cannot do so, if she does not want him to take the kids on vacation to Disney Land he cannot, every other year one or the other claims the kids on their taxes and the other one loses a lot.
If one parent gets married they then have dependents and can get those tax breaks on their own. If the other is still single they lose out on those tax breaks on the year they don't get them.
I think the children need to have one permanent home, where they know they are going to wake up next week, to build friendships with kids they go to school with, to make those connections that will last them their entire lives.
I think that the parent they live with to go to school and live with should have child support each and every month of the year. That money is for housing, utilities, food, clothing, transportation, all the things that allow them to live in a home and have a good life. Those things don't stop being part of their lives if they go on vacation with the other parent even if it is all summer.
I have a friend who's ex husband worked out of state for several years. He got a different job and they are in the same town now, living in the same school district. Their youngest daughter is pretty close to her mom, she's 9. The ex and my friend have 50/50 custody with no child support or any extra conditions at all. The girl is required to go to dad's house one day in the evening and when she goes to school the next day mom picks her up and so forth. On the day's she is to be picked up by her dad she starts almost as soon as her feet hit the floor not wanting to go to dad's, she just wants to be at home. She hates him more and more each day because her life is in such turmoil. She just wants him to move away and leave her alone. She begs her mom to find her an attorney who will fight this for her. Mom tells her that she is fine and nothing is wrong with going to dad's.
Mom is working 2 jobs just to try and live, she works full time at one job and then works evenings in a kid friendly place so her daughter is with her on the days she is with her.
As soon as this girl is 12 she is going to the judge and beg them to let her never see her dad again because she hates him since she can't be at home every night. She would be happy to see him a couple of times per month. They do stuff all the time when she's there in the summer, but she wants to have one place to live, not 2.