I looked into another welder for "portable" use a couple of years ago. Instead of buying another one I bought a 6500 watt generator. We use it for emergency power and when I need to weld or have elctricity away from an available source I just load it on a trailer and haul it to the site. If It's a welding job I put the welder on the trailer with it.
For inside the shop or near it, I put in a 100 foot 8 gauge spool of wire. One end connec5ted permanently to the breaker and the other end has the receptacle that matches both the welder and a 220 50a lead from the generator. I can move the welder anywhere in the shop or outside close by. For long term emergency power I put the generator under a leanto and unplug the welder and hook it to the generator. On the main service pole we have an isolation switch to take us off the grid when needed.