Welder
You definitly don't want to cheap out on a welder.Go with a Lincoln SP-135T.It comes all set up to do flux cored wire and gas wire.All you need to run gas is a bottle of CO2 or 75/25 argon-co2.If you buy a no name welder such as a Chicago Electric,Chicago Pnuematic,Astromig,Century,or some of the snap on welders beware.Trying to get consumables for them is a nitemare.I run a welding supply store in CT and would only recommend the big three welders.Lincoln,Miller and Hobart.They are all priced within 50 bucks of each other.The bottle can be as little as 79.00 up to 200.Flux cored wire runs hotter and yields more penetration at the expense of a spattering weld.Try buying something from a company who stands behind their products.Lincoln is by far the best and I have dealt with them all.Figure spending about 525.00 for a SP135T from a welding supply dealer or about 450 online with free shipping.Call me at 203-596-1564 or 203-879-0200 if you have any questions.