Nice thread and photos, ready to start building my next barn and your thread was a help. When I turned my small barn (30x40) into a motorsport shop, I ran metal studs around the perimeter and dropped the ceiling using commercial drywall track. That way I ended up with perfectly level walls and...
Why limit yourself to R19. I used commercial metal studs and hat track ceiling to end up with straight walls and ceiling and R30 walls and R42 ceiling. Cool in the summer, warm in the winter.