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

Nice size! batt insulation osb and metal siding inside. Surface wiring and air.
A pellet stove would need to be a good size to heat it. Electric furnace or oil furnace. in floor heat is nice, if building is well insulated and sealed. Buddy’s shop is large and built with some really bad ideas,$1000 a month to keep it from freezing. I heat my 24x32 for the winter on less than 1000. I burn $450 in pellets For the winter.
Depending on insurance, and purpose of shop, a wood/electric furnace would be in my sights.
Electric to maintain minimum temp, wood when the party is on!