You sound like a kid bruh, so listen here kid. While what you saying sound nice
A judge would laugh you out the courtroom.
Regardless if YOU HATE THE MOM, the Kid don't. The kid don't want grow up watching mommy struggle
That type of situation could lead to drama when the kid reaches the her teenage years
A kid with money to burn, while mom struggles. All types of fukkery could go down
If you get into a beef with mom... FUK YOU MOM, I'lL GET A HOTEL OR MOVE IN MY DADDY... fukk OUTTA HURR
These are the types of scenarios that could arise under your idea.
I'm not saying the current way is GOOD, it needs to be changed. But your solution doesn't work imo either