How to heat

I’ll say to go with wood now, but not in the conventional manner. That’s a nice looking workshop garage, but every tall tree around it is to be viewed as a potential enemy and really needed to be put on the ground before it was constructed, IMHO. But I never have liked carrying wood in and ashes out of a garage. When I elect to heat with wood or coal, the front of the stove is going to built behind a vented door compartment (doghouse if you will) on the side of the building and the exterior and flue pipe is going up inside through a heat exchanger. Also put it on the end of the building along with the flue pipe exit, not on the side with the drip edge. I don’t know how many flue exhaust I’ve seen taken out by the inevitable deep snows sliding off of a metal shop roof. As far as firewood, start with the small trees and wait to get to the big ones as time and finances allow you to access a wood splitter.