I love PITTSBURGH
I am a pilot for that airline there, U know the one? ;-)
I won't give you advice on specific schools. But here are some ideas:
1. Don't pay everything up front, sort of pay as you go as you never know when a school will go out of business without notice and without paying you back.
2. Get your girl to read a few books about flying (cheaper than actual flying and it will help).
1. "Stick and Rudder"
2. "Fate is the Hunter"
3. "Spirit of St. Louis"
that should be good enough for a start
16 is a tiny bit early, remember you now have to have that 1500 hours to be a copilot at a major (realistically much more) and you cannot get an airline transport pilot license until the age of 23.
Be sure to get her a medical certificate because you don't want to pay all that money to find out something is wrong (hopefully this will not be a problem).
Little things along the way will help too like a radio to listen to air traffic control ( I guess you can do this on the internet in some locations).
Studying a little meteorology would not hurt.
I hope this helps. And Safe flying for you all!