I would love to keep my small shop at 40 all winter, That would be something, I can keep it at 80 in mine no problem but to do that everyday, I have to turn it on from my radio room here and about 1/2 an hour of a turbo heater going i go out and turn large kerosene heater on... I would love to be able to have a furnace and keep it a steady temp all night, It sure would be great with welding alone, wire gets moisture and then doesn't work the way it should, ive overcome a bunch of problems like this but at 40 degrees constant, lol, it truly would make shop life simpler, exspencive but much better... And you do have a great project going there, i would love to tackle one myself maybe some day....