I remember way back in the day had a bench inside with electric circuit on it and the outside might have had one or just a grounded drill laying on it, was moving the welder work ground around, I actually figured it out when it didn't weld right, I don't recall burning something up but nice little arc strike on the tool case. The welder didn't move, sat on another wood bench so I bolted piece of welding lead between benches eventually splicing it to the machine leaving the lead available for jumping on machinery.
Today with steel building, common machine ground at the column, a quick connect bolted to it, use this lead for plasma, some stick but can go out the door or on the floor, if its more convenient, bench is grounded anhaveve a ground stinger, could swap it around, etc. The vise in the welding booth is cable connected to this common. Then a Y at the machine again, an electrode stinger hangs there to serve booth and benches and another one for remote on floor or outdoor. Never have to move thmachineses, could, disconnectsts and power, its already got a stinger, snatch up any one of the remote grounds etc.
I eleniated the pathway issue by grounding the bench via the welding ground and fed the 120 via 2 wire gfci Stand alone wire feeds we march the work cable around with the machine just like factory, they really dont seem to like ground loops anyway, hooking as close to the point of work or on the same bench via clamp or vise is best.