So I stink at editing, but we built this pretty sweet setup that I thought you may like to see, don't bother adjusting your volume as there's no sound (copyright infringement and all:-)
whoa so sick! oh my god. how did you make it? did you use turf?
It's 90 feet of old pond liner (maybe 1/8inch thick plastic) on top of 4x8 sheets of green particle board lined with 2x4's for tracks. The deck is also a double stacked 4x8 sheet. It's only 6 feet off the natural hill height. On top of the pond liner you can see the white PVC pipe drilled in, which we cut in half, to give all the joeys a little confidence and to use it as a water slide as well:-) However, if a skier is scared and presses out to the pvc rails, they'll slow down and barely make the water. We have a pump recirculating the water from the pond back to the top of the drop in but in addition you have to have neoprene sticker strips on the bottom of the skis (you'll see them on the bottom of the white Line skis). The adhesion powers of water and ski on a flat surface are unbelievably strong, the neoprene eliminates it and we pretty much point them straight and hydroplane off the ramp. If is very difficult to spin, since you can't set and edge, it's all upperbody movement first as I'm an old mogul skier used to having a strong base set.
Cost, don't know, our pond liner was used and free, it's just layered and cut, that will be the tricky part for you.