Douglas, I would ask someone at a welding supply store if the welder you want has enough ass to weld aluminum. Aluminum is an awesome heat sink so it takes a ton of heat to make a weld. I have never used a 110 volt welder for aluminum. I have a friend that bought a Vulcan 220 volt mig welder from harbor freight. He uses a spool gun for aluminum. It seems to work well and only cost him around $700.
Good luck
Loren