So until there is a satisfying solution for this, I predict we won't have libertarian/ancap "utopia".
Don't have kids if you can't afford it.
Yeah, only the socially advantaged should have kids. So, in a few generations we can weed out the dead weight.

kidding
Honestly, I think there should be some objective standards for allowing reproduction. I'm not so sure about freedom of reproduction if it results in suffering.
sry for the hijack.