an 8 foot half pipe could cost a couple grand and nick there are alot of things your not seeing, on a halfpipe you have to use about.... 8 foot one maybe 50 or more sheets of plywood because you have to make it double layered. then about 100-200 2x4s then coping, and if its really going to last skatelite which is 180 per 4ft by 8 ft sheet so then about 25 sheets of skatelite add it up $4,500 just for the cover skatelite... it could cost up to 10 grand or more if its going to last more than 5 years
dang arnor i didnt know you made this post, halfpipes are really expensive bro i made 3 before the last one i made costed 750 dollors and it was 3 foot high and it didnt have skatelite with 1 layer of top plywood it only lasted 1 year about:/
honestly maybe use a fund raiser or something but maybe buy a preowned one... and 5- or 6 foot would be better for tricks and stalls honestly