did it
I got my PPL at age 17 and did weekend flying with my buddies when we could put 80 bucks together so 4 of us could take the 172 around town
Hung out at airport, flew as "safety pilot" and "co-pilot" (!!!) for all the local airplane owners, etc. I was also line-boy at FBO as "primary job" from age 18 to 22, also sold newspaper subscriptions and used cars.
Line boy job got my name out there as "that line kid who is now a CFI" sort of thing
Went to college in meantime. Worked 3 jobs and by junior year I had $10,000 put together toward IFR-CFII tickets at a 141 school. In summer, Went into 141 school with all writtens done, about 400 hrs TT, and pretty solid understanding of IFR flying.
Into college senior year, hired back at FBO as the lone CFI, and maybe 1 year after college, I was flying Navajos at a Part 135 operator, age 23
it can be done, but it sucks. My "this is my future wife" girlfriend and I, we broke up, my college GPA was like 2.2, and I really had no college life (partys, girls, ball games) outside of driving tugs, fuel trucks, and trying to build flight time.
Line job was (still is?) considered to be "apprenticeship" towards an aviation career. That was THEN. Now with all the Comair Academy's, "Airline Fasttrack" schools, etc, I wonder how many of those students have climbed a ladder to fuel a Caravan or got shirts permanently stained with 2380. No, thats not a zip code.
Good luck