If he doesn't know anything about it,,,,,, I can almost guarantee someone gave it to him because doesn't work well enough to use. Lots of machines on the market that barely work new, and one little problem and they don't work at all. I would go have a look at it, with ONE thing in mind, the BRAND. If it's Miller/Lincoln/Hobart (not likely) it could be a bargain - otherwise, don't bother even plugging it in. If other brands are worth taking a chance on, those who know can mention them but I've only used the 3 (very rebuildable brands) mentioned. Some folks could probably evaluate it, get it going, but you said you don't know wire-feed. I read often on forums where a guy who's never used a (good) wire-feed will try to use a junk machine then all they know about wire-feed is it doesn't work. And then he decides all 115v wire-feeds don't work. And sometimes they know it very, very well ! :laughing:
It sounds to me like if these guys had any time or money to take their trucks to a shop, they ought to be getting OTHER maintenance done. If I had a welding shop, and someone came in with weld-upon-weld I'd turn down the job. Whereas a traveling welder, you do the best job for the $$ offerred then "c-ya". Man there must be zero $ in hauling potatoes. What do they do with a load of potatoes on a broke-down truck blocking the access road?
Some welding can be satisfying, but re-welding broken fatigued stuff, weld-upon-weld, is not fun. It's just gonna break again in the same place, they will always blame the last repairman. That's not satisfying, especially when you see the guy again and he want's you to warranty it.
Sounds like it would be interesting for a couple days though. How do you bill? By the hour or by the job? Are you getting cash?