This is what I'm finding out, and it makes sense to me now. New projects = new learning opportunities.
I'm now looking at inexpensive stick welders to purchase or rent. The Everlast PowerARC 140 (which I think is what LawnJockey is referring to) looks interesting at $256 from Home Depo. Says a 140 amp max at 240V (100 amp at 120V). I'm thinking that the 35% duty cycle would be fine if I just plan on taking my time with it. I'm also thinking that 120V might not be practical to weld 1/2", but not sure.
Again, thanks everyone for the input and feedback.