I can highly recommend a flight school in Miami called ENDEAVOUR FLIGHT TRAINING. As the Uncle who's paying for a young lady to do what your lad wants to do, I searched long and hard and visited the flight schools on the west coast and the east coast before deciding on this school. I chose this school for size of class (one to one instructor to student training versus some of the large schools that are like pilot factories that don't teach nearly as well as a small shop), aircraft maintenance and safety, and modern fleet of new or near new Cessna 172's with Garmin 1000 nav systems. It's not cheap but no flight school is: US$180 per hour for the plane plus $57 per hour for the instructor. The owners are ex-miitary pilots and VERY focused on the students success. Instructors too are exceptionally focused.
PM me if you want more info.