How can i get my parents to buy a car?

im 16 and i have my license. ima junior and they say theyll buy me a crv when im a senior. for right now i gotta share the white honda mini van with my mom. soccer season is gonna come around and i really would need my own car for that. the reason they dont wanna buy it right now is that they say they dont wanna fork over that kinda money right now, but my dad wants to buy a 38,000 dollar boat..and we already have a boat. any suggestions?