Want plasma cutter, but no power hookup

Where is your breaker box in relation to where you are going to be working?

If it's outdoors, and closer than the dryer connector, you could easily wire a connector in there, even if "temporary."

How about your range? gas? electric?

When I built the carport out front, I shut off the breaker for the AC, got into the box, and temporarily wired a pigtail into the AC disconnect