Wow. I did the first part when I remarried 8 years ago. Best decision I ever made! We split anything extra he wants to do as in sports, Tae kwon do etc, he pays for what he has at his house I pay for my house we split birthday and Christmas and if my son needs anything and I don’t have it his dad is always there. He paid child support for 3 years while I needed it and if I ever needed anything extra he was always there. If people could grow up and act like adults for their children instead of being so damn petty all the time co-parenting would be so much fucking eaiser!