I've got a cheapy Harbor Freight 90 amp mig welder. I haven't done a lot with it, but I did make a roof rack for next to my Yakima Skybox.. it didn't fall apart even running the Mojave Trail and we were bouncing down it pretty good at speed..

I have no idea how long it will last, I know it's not a "quality" welder, but it's done exactly what I wanted and it was right around $100. No need to wire the garage for 220 either. I have two more projects in my head but I'm not sure when I will start either one. But so far for everything I've done and think I will do it's the perfect BS tool. If it breaks it was still worth the $100 at this point.