Interesting setup. I'm fortunate enough to have a 300gal tank with gas powered vac pump running what can be 150' if needed of 2" hose...

Despite the main pump tanks capabilities, I will still be building a portable unit, my thoughts is a 35gal poly tank with a short hose, wheeled, and a custom made lever piston pump with one way valves for air and oil flow. Just waiting on my new lathe in the mail to machine the parts needed.