I need to add some additional power in my garage for 50 amp welder, 30 amp air compressor and 20 amp saw. (220V). Also additional 30 amp welders. The cheapest way is to run a 50 amp circuit to the garage and put in an outlet. Then make some cheater cords to power the the compressor and saw. The welder can plug right in. The most expensive way is to install a 100 sub box in the garage and install 3 circuits for the above mentioned devices. The garage has 110V for outlets and lights. None of these items would be left plugged in when I am not there. The air compressor has its own thermal cutout and I am not sure about the saw. There are also some in-between choices. Its not a long run, maybe 15'. The welder can draw a max of 70 amps on its max setting, but doubtful I would be doing any welding at that setting. It would not be likely two of these items would be used at once. I do have a plasma cutter that needs compressed air. I could use my other 110V compressor for that however. Other ideas?