Blank canvas, steel sided 40x60 pole barn. Thoughts on insulating, electrical, heating???
My shop is 30x40 but 10x40 of it is an internal room, leaving 20x40 for the working area. I did 6" bats in the walls covered by 1/2" plywood, and the same bats in the ceiling covered in some kind of tyvek material. I agree with other posters that doing your electrical external to the wall is the way to go. Mine is internal and luckily, so far I got it right so I haven't wanted to change it. I use a 30K BTU propane heater with two BIG ceiling fans to push the heat down. In 20 minutes or so it will be 30 outdoors and 60 indoors. Just right for sweatshirt work on the car.
A handy dandy tip for guys with sliding barn doors. I made a set of gasket-like things to plug the gap at the door and they work very well. They keep the cold draft from coming inside when the heat rises to the peak of the shop. They are 3/8" plywood with foam pipe insulation attached to the edge. Close the door, shove the gaskets in place, and go to work. Here they are loose and then in place. You can see the 3/4" door gap above the top gasket in the second picture.