I think the more you connect custody with money, the worse it is and the worse it appears.
I know, i know, you will claim "no relationship between the two" & i will refer you back to your words and how they sound to ME.. And then you will pretend that you were again(!!!) misunderstood.
Just fight for time with your son because that's supposed to be impotsnt to you. It won't possibly make you look bad or selfish or manipulative ---
UNLESS
YOU KEEP CONNECTING the issue of how much time you want with your son, to what you'll pay her. They are supposed to be Unrelated issues! Accept that...
I'm Not suggesting you get him half time. But any dad who is satisfied with 10% time and thinks that will impress his ex wife, or look "generous", is not thinking straight. Wanting time with your son -- just for the sake of bonding with him (& not trying to LOOK GOOD) means something.
Be generous with the money, but "reasonably demanding", (& flexibke!) when it comes to being a present father in your only son's life.
That's my opinion.
M: 57 H: 60 M: 35 yrs S30,D28,D19 H off to Alaska 2006 Recon 7/07- 8/08 *2016* X = "ALASKA 2.0" GROUND HOG DAY I File D 10/16 OW DIV 2/26/2018 X marries OW 5/2016