I didn't think of the money angle - good point wayfarer.
I'll add to the laissez-faire custody thing that wayfarer brought up. We had a fairly strict 50-50 split and schedule that we didn't really deviate from in the beginning. 4 years out now we are able to have much more flexibility. Also, in the beginning she didn't want flexibility as she was out on the town sleeping around etc.
The other point around boundaries and the schedule is that this new arrangement might reduce your contact points with her during the week - which is a good thing. The less you see her and stay dark, the better.