Robbie,
You might look into that 5# bottle of Co2, drop by your local welding supply place and talk to them about it.
Also, that Harbor Freight has a Viair knock off that MAY do the job, it's much cheaper, under $75.00, as I recall. It pulls 12 amps if I remember correctly. You could mount it under the hood and run an air line back to the rear bumper.
I mounted mine under the truck and ran the air line back to the bumper with a female chuck there.
Ozz
'07 3400RL 2nd RTU
2 Golf Cart batteries 3,000 watt inverter, automatic transfer switch
Honda 2000 Generator, 2nd one and twinning kit coming
Maytag's with 220 Dryer
Stationary domed Sat. dish
LCD 12 Volt Amp gauge
LCD Tank Monitor
3 added 120 volt outlets
On Board Air; 12 Volt Viair 450C compressor
2006 Ford PSD 4x4 Off Road Lariat
Hadley Air Horns
Truck inverter with 110 volts for laptop
Color Backup Camera
Awning lock
