Here's one for you.
For the UK based people how about an MSc in Air Transport Management? Alright it's not free, about £9000 for the whole course over as long as five years, BUT (and I think I read this part correctly) you can undertake the first module to assess your suitability for the rest of the course for nothing.
By the time you've finished that you'll either be back to flying your @rse off so too busy to think about the rest or will be flying and accruing enough money to pay for the rest of the course.
Not sure what the deal is nowadays but you used to be able to pay in instalments.