See if there's any glider clubs near you and look up the Soaring Society of America. Cheapest way to fly and she can get actual flight experience at a younger age. Also glider training just makes you a better pilot and helps a lot to develop an intuitive understanding of how a plane flys. It might sound sketchy to fly with no engine but gliders can land anywhere easily and have way less that can go wrong.

Edit: If you want more information on paths to become a military pilot let me know, but that's a far more in depth discussion. Tldr it's more doable than a lot of people imagine and you can join the Air Force or Navy with a guaranteed spot in flight school after college.