You know all those 199 dollar mig welders and even most of the ones on Ebay, they suck buddy. A good mig welder is gonna cost you. Also, on setting up a welder Miller has these cards, they have a pull thing in the middle, and you line up the metal size with the type of metal and they give you the starting point. Yu must fine tune from there depending on how you weld. Why are you choosing Mig? I like Tig myself. You can pick up a Miller Dynasty Tig welder for about 2700 bucks. Get used to the term "stack of dimes" also. Because thats what you want. I just worked at a place not long ago and well, they just had me pulling beads as fast as I could, and if it looked like sheot we grinded. That sucked. Your best bet is to hit the Adult Education school in your area. They have probably two night classes a week or a 6 hour saturday course I am sure. OOps, TIG welders are also stick welders, as well as your high end MIG welders are also stick welders. 220V is what you want, not those cheap 110V. They don't penetrate and are mostly made for small gauge steel or sheet metal. With TIG you can do anything, the possibilities are endless. Not only that but when you get good (10 or so years) You'll be able to weld anything. BTW MIG welding is fast man. I mean fast.
Watch you puddle, run it, in small circular motions and move. And don't think a welding job is easy. At times its hardcore man..............
Just tellin' ya how it is bro......
Good luck.......
Keep us posted........
Walli