From Texas Standard:
Few parents put pen to paper to figure out how much they'll spend if their kids end up loving the activity they started at age three. For example, by the time your adorable toddler girl – who’s in love with ballet – graduates high school you will have spent as much as $100,000 on fees, tutus and training. That's according to an estimate by Dance USA.
If your daughter goes pro – her training could be as expensive as a doctor's. But ballet is not just for girls. Boys spend much less on a lifetime of ballet training.