I specifically mentioned stick as an aside because I'm well-aware of it's capabilities; Having made several similar to the one described in your junk yard soliloquy. My concern lies within specific materials and finishes related to TIG and MIG which obviously don't run on car batteries. Even if you went nuts with deep cycles, inverters, etc. it's not worth the headache there. As far as gases and their availability are concerned, I'm aware that one "needs a grid" to create those. If my home is off grid but I can acquire items from the grid -- which is most likely never going away in my life time -- then I will bring them to my unconnected property. Same goes for any consumer item. I don't plan on raising dairy cows but I will be drinking milk, sourced from a nearby creamery which has lights, heat and air conditioning from the grid. I simply chose to be off grid for frugality and less-reliance on a larger system.
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