Yes, buy a mig welder that uses external gas shielding. A 110 Volt will work fine for sheet metal bodywork and will save you some money.

I am a fan of Lincoln Electric, they aren't the cheapest, but they stand behind their products. I bought my SP-100 back in the early 90's and have had zero problems with it.

http://www.lincolnelectric.com/en-us/support/process-and-theory/Pages/mig-vs-flux-cored-detail.aspx