Well, the problem is none of your arguments are real guarantees for good education.
You talk about psychic or financial evaluation...
I'm pretty sure some "poor" kids are happier and better taken care of than richer ones.
And pretty sure too that some socialy unstable parents are lovely with their children because it's their children, and that it's a unique relationship compared to any other one.
I'm afraid the only way to know if you're a "good parent" is to have a kid and find it out the hard way. So controlling it before the kid comes... seems impossible to me.