I've never understood people's fear of TIG welding. To me it's the easiest of all methods. You constantly control the heat with the foot pedal, and go as fast or slow as you want, adding as much or as little filler as you want. This is a big advantage for longer welds as the metal heats up more & more as you go, needing less & less amps. The inverter TIG welders on ebay work fine & can do TIG, stick, even plasma cutting on some models.
Get an AC-DC unit and you can do aluminum too, but now you're talking some coin.