What is the minimum size I need? I realized today I'm going to have to purchase a bigger compressor when I tried to run a 10 scfm needle scaler and the portable just wasn't keeping up.
I want one that will be big enough to put air in the truck tires on 3/4 ton and 2 ton trucks, run air tools; but they getting quickly replaced by battery powered units, and can see a need future need for a soda/sand blaster and possibly spray painting.
Harbor Freight, Northern Tools and Lowes have 60 gallons tanks and 2-3 HP motors but don't want to buy one of those and have to upgrade in a couple years.

My shop isn't finished yet but I have a forklift attachment on my tractor and can make it portable by mounting it on a pallet and plugging it into a 230v/15a outlet.