At 15K a year for 7 years (of MS and HS travel sports) is 105k plus interest .... better hope you are getting a nice scholarship to break even. Sometimes parents don't get it... we have 15k a year for softball but suddenly when you get to college we won't have it and you better get a scholarship.
On the gymnastics front, I had a girl in my class a long time ago who did Gym 6 days a week - cost them $350 per month for just practice - early 2000's prices. Add in the costs of travel, etc. and practice since she was 5 and you have a very large amount of money saved with interest. She told me she did it to get a college scholarship...uh...okay, did someone do the math with your parents? She quite gym by 10th grade because she was burned out and tired of not having a life.