A 110v welder isnt good for anything more than light body work.
I disagree. I've built a lot of weight racks, part of my pulling truck chassis, the entire drawbar/ hitch setup, and countless drive shaft loop setups with a 110v Lincoln SP135. All of which have been tested repeatedly to see if the will contain, or stand up to what they should.
Now, that being said. Should you use a 110 welder for that? No. It doesn't penetrate enough. But with slow motions, and way more hours with a grinder to prepare than any one person should ever do....... It will get the job done.