Blank canvas, steel sided 40x60 pole barn. Thoughts on insulating, electrical, heating???

If you're thinking of using wood for a heating source, please check with your insurer. You'd be surprised how much higher your rates will be. Just saying, check all your options. I used R21 in the walls, and R34 in the ceiling in my 24X34. I can heat it with a small ceramic or kerosene heater for cheap all winter. If I could do it again, it would be some form of floor radiant heating. I'm pretty happy with what I have. Go for the best insulation you can afford. Paul.