It depends. If the program is good then it's usually more expensive. But good programs have a lot of fundraisers. For example, I play softball for my high school and it's $450 a year.... It covers uniforms, tournament fees, merc, and this camp we go to at Alabama every summer. It's an investment so don't play around.
I think it's cheaper, but it depends if the sport outside of school is serious or not. Usually if it's serious it's expensive.
Most times school would be cheaper. It depends on the school though.
Not really
Say if you were going to join a softball team, would it be cheaper to do it through the school or outside school?