Those have been out for years. Questionable legality in some areas. I can't see wanting to wakeboard behind it, what wake are you going off of? You'd be better off winching or hitting the park and both would cost you less than that. I think the guy on here that made the golf cart winch would be able to sell you one for the same or less than this contraption.
Besides, you can't surf behind it, so I don't want it.