I agree that many (most- nearly ALL!!!) home compressors will not supply enough air for doing an entire cab. A friend rented a "pull-behind" diesel powered one - normally used for running jackhammers - complete with an industrial-sized blaster that was designed for doing bridges - to do the underside of the floor his Nomad plus the frame and the suspension pieces for it. Got it all finished in an afternoon. He said it him cost less in the long run than other approaches. He only had to rent the rig for a few hours to do it all!
I'd be WAY too scared of just blowing right on through the floorboards to try that!
For the body panels and the cab plus chassis, plus (etc) on my '56 F100, its all going into the Reddi-Strip tanks so it won't get work-hardened and warped from the blasting.