Student loans.

[johnjohn]

$18,000 debt left from my wife's first degree, (we've already paid about $14,000 off)
$35,000 for this one and God only knows what her masters will cost us.
(Basically the cost of a used Ferrari Spyder)

Thank god she's already being scouted for gov and policy jobs, so she'll be making more than me in a few years.
Thankfully we got good interest rates on everything.

I get frustrated sometimes, feeling that I while I'm making good money I shouldn't be living like a student at my age.
But it's only for a couple more years (even after she graduates what she'll be making will largely go into paying off her school debt), and I did know what I was gettin into.