Why do all these PP assume their money is separate?
Because when the PP said "my student loans are $xx,xxx and my husband is debt-free," it gives the impression that their finances are not combined. Combined finances means the debts are their joint responsibility, not just hers. But the OP clarified, so, no harm no foul.
OP, I think focusing on, at the very least, that higher interest loan makes a lot of sense. I don't know how you're fixed for retirement savings, but that should probably be given a higher priority than a 529, also. You've probably heard this a million times but your children have more options for financing college than you do for financing your retirement.
Anyway, best of luck to you! I'm single and I have a 19 month old and day care, holy crap. It is a killer. If I didn't have family in this area I would be so gone.