Pay your own way through the private & then see if you're still on fire for aviation.
$8500/50hrs (average cost and flight time) = $170/hr. Even with part time work, you should be able to swing an hour of flight instruction each week and end up shy of a year with a private pilot's license.
IF you still want to pursue flying professionally, you'll have a year of trying to earn grants and searching out the best deals on loans.
Borrowing to go from zero to hero has burned countless potential pilots and this board is littered with their stories. Don't say you weren't warned.