Banshee bungee

I'm thinking about getting a banshee bungee, I'd prob get the 10ft. Just wondering if it's worth the 200$. I've never skied erban before but I've found some spots that I wanna hit this winter. Their are no hills around it so you would need some good speed to hit some of the rails. 200$ sounds like a lot of money for what it does/is. Am I better of just paying the extra money for the 15ft? How fast do u go on the 10ft? Is their a big difference between the 10ft/15ft and 20ft as far as speed. I'm just worried I'm going to pay 200$ and it's not going to give me the speed I need and it's going to be a waste of money.