As a former welder by trade I can again tell you that the off shore equipment does not hold up. The Miller Diversion 180 is an ideal welder for you because it will operate as a 110 or 220 volt machine. I usually avoid making a direct recomendation but since you seem to be hell bent on getting into this and possibly shooting yourself in the foot I figured I would speak up again. TIG welding is all about hand, eye and foot coordination. It takes hundreds of hours to master those pretty tig beads you see on race cars and stuff. You initial welds will look like chicken poop and thats just the way it is. As you weld you need to practice a specific task such as proper stick out, proper arc length, and useing both hands to drag and push the bead. Once you master the bead and watching the puddle, then you can consider giving aluminum a try. Aluminum is much more tedious because the difference between fusing and blowing through is very very close, so you are going to blow up a few welds till you learn to see the meatl go shiny and just start to sag. It adds the element of timing to your hand, eye and foot coordination drill. A used Miller 180 can be had regularly for around 1000-1200 if you wait for it to come up on Craigslist or the other sites, so be patient. I am medically retired due to another issue, but I welded 12 hours a day 7 days a week for 2 years in Iraq on armored vehicles and homogonized aluminum structures and I promise you I wont send you down the wrong path. I am definately not trying to impress anybody, I just got those skilz when I was a young man and have used them for many many years to earn a living and feed my family. Welding is truly an art form, it takes time and practice to become adept and continued practice to keep your skills sharp and usable. If you would like to PM me you may, I am more than willing to help you get started and moving along the road to ultimate success. Why do you think all of those used tig welders come available? Because they become frustrated and give up before the miracle happens for them. How do I know this? I have watched and trained literally hundreds of welders and newcomers over the years and can see right through the facade and know whether they will ever "get it" or not. If you set a goal and work up to it in logical and diligent steps you can do anything you sey your mind to, but welding with a tig is a study in patience and tolerance. I hope this finds you well and again, I am definately not trying to discourage any one, I just feel you should know what you are getting youraelf into. Hope this helps, and I am a PM away if you need to discuus your decisions.
Wheelchair Bob