Here is a couple of pictures of a powered air reel that my brother and I built with various parts this fall. It probably cost around $400 for the winch, bearings, gears and air swivel. There is about 90 feet of 3/4 air hose on it. I think a commercial powered air reel would cost close to $2000. The winter weather caught us a bit as I was doing the finishing touches to it. We normally store it inside.