How do I choose the right welder?

[ERASER5]

That is a Flux Core welder. You do not want that. You need a MIG. A MIG has a gas hook up. You can run flux core on a MIG welder for heavier stuff, but you want MIG for body work. FC will blast hole right threw sheet metal.

There are no 110v MIG capable of welding aluminum. There just is not enough power available. For aluminum, you have to go 220v and at least 175amps. The melting point of aluminum is low, but it conducts the heat away so fast that a lot of heat is necessary. For bigger chunks, pre-heating is needed.

Gobbels is correct about the variable controls vs notched control.

As for buying a bottle, rent it instead. (Look to spend $300 just for the contract) You can buy a bottle, but to get it filled you will have to go to the actual filling company or you will not get YOUR bottle back. You will suddenly have a "rented bottle" and get hit up for "back rent". Just rent it. The headache and anger saved will be worth it.

Great welders are not cheap. Good welders do not have to be. Take look at Eastwood welders. Looks like a good value offer.