If you already have the money, like you said, and they wont let you go, convince them to let you go next year or something, talk about it, like the guy above me, research it. Give them the old "If I learn the right way, I won't get hurt when I normally ski alone" Thats the only reason my mom is letting me go to water ramps this summer, so I can "learn" how to do stuff on a softer (water) surface.