Buy at least a 220V machine and the biggest you can afford!!!!!!!!!!!!!!
A 175/180 amp machine will weld most anything you can throw at it on a car. I have a Millermatic 175 and wish I'd spent the cash on a 250 class. IMHO, don't waste your money on a 110v machine.
If you can get 220 volt, 50 amp service do that. A 30 amp is all that's needed to run most 175 amp welders and home style 60-80 gallon compressors, I have one 30 amp service and spend some time unplugging and plugging welder/compressor into the outlet. Make sure whatever you are plugging in is turned off... bzzzzzzzzzz followed by .... damn that hurt!
