Oh yeah. I forgot to mention that the larger tanks like a 350 cubic footer weighs in at 189 lbs. full. So if you cant haul that much weight around, then maybe a 150 cubic footer may be the way to go as the 150's weigh in at around 74 lbs. And you will have to make sure your welding cart can handle the extra weight. The larger tanks are huge, so plan accordingly.
Powertig 250EX
Powerplasma 50
Hobart Handler 210 with spoolgun
Cobra 2000 / Henrob O/A torch
Drill press / metal brake / 36 ton air hydraulic press
Franzinated modified Craftsman 33 compressor
Lots of other metal working tools