You remember the service truck I had? that was a 22 CFM hydraulic driven compressor and for blowing off a combine and running impact wrenches that was perfect, would not consider anything less to get the job done without waiting for the air to build up. 

Also the 12 volt power inverter works well to charge cordless tool batteries, I have a 400 watt one in my pickup that powers my laptop and charges my cordless batteries and it works well, just hook it up so it is keyed on/off or it will kill the battery.