that track is mine in the link. we spent a total of 74 dollars on piping. half of it is left over bc we got the other stuff free but one roll probly would have been good.. and dirt, we got 5 loads of red clay dirt (10 tons each load) for 40 bucks a load. we got a deal but it doesnt cost too much to build one really. its harder to build it than pay for it LOL