http://www.usedvictoria.com/classified-ad/lincoln-Mig-Pak-140-120v-20amp_21166993 here is an example of a welder that should suit your needs. Consider it a minimum. most 110 volt welders are garbage. Both Miller and Lincoln make an ok small welder but they are pushing the limits of what you can do with 110 volts. 220 volts gives a much more stable arc and feed speed is not affected as much when you hit a dirty spot or change positions.(on a 110 volt unit you can hear the wire feed speed go up and down with how much power is being used by the welding process, this makes the weld even worse in bad spots.) 150-200 amps should suit your purposes nicely.