How do I run air tools from my truck over DC? CHEAP! LOL :)

Has anyone wanted to run some air tools from their truck?  What was your setup?

These are some tools I was to try and use:

Ingersoll Rand 1/4″ Air Die Grinder 3107G  3 CFM
Ingersoll Rand 326G 3-Inch Edge Series Cut-off Air Tool  6 CFM
Ingersoll Rand 170G 3/8-Inch Edge Series Drive Air Ratchet  3 CFM

I was thinking about trying a small DC air compressor…. around 3 CFM @ 90 PSI?  The Puma PD-1021 runs off 12v DC and I would not need to run an inverter (I believe I would need a 2000 watt also and I wanted to try and get a Xantrex inverter).

Then if I get an inverter the question is…. (Inverter I believe is $350-500?)
1) Should I purchase an air compressor? Or just purchase corded tools for the inverter?
2) If I plan on purchasing an inverter why not repurchase everything cordless! LOL 🙂

This idea seems like a bad idea?  Or an expensive plan.