I like MIG welding, but I really do hate paying for Argon. 110V machines can be run with helium in a pinch to produce a hotter arc if need be, although your nozzle may not appreciate it so much, depending on what you're running.
I've welded lots & lots of tubing with a 110V buzzbox. Keep your amps low, and be judicious. Pre-heating the parts really does help, especially with the thin stuff (although, it isn't necessary at all, and it is a lot of extra work for a marginally stronger weld).
That's just my 2 cents. Before MIG welders came along, bike frames were either stick or torch welded. They worked A-OK. :thumbsup: