And do you have a 4 (or so) gallon portable compressor? Does it do the job?

I want to get an impact wrench, ratchet and compressor.... but I want to be able to take it with me...

 

I keep one in my truck. It pulls my air tools better than the 220V compressor that I have in my shop. It costs about $1100, though. I would recommend that you get one that puts out at least 9 cfm(cubic feet per minute).

 

There is a Dewalt portable for about 300. I have to look at the specs...