ConstructO.....another option, since you are looking at $5,000 plus for this little adventure. How bout looking at a used Water Company Truck. Their Medium Duty trucks usually have compressors set up on them, with air outlets at the front of the truck. Have that as your work truck that hauls your skid OR maybe the Water Co. in your area sells some of the used tampers? Just a thought.....
KSSS, good idea on the breaker......bonus points on that one..... I could use that set-up tomorrow to compact behind a wall, would ya mind just bringing it over for a day or two?