Don't take all this recycling to mean that Mike's shop is cobbled together. It's a polished place with attractive exterior and interior features that make maintenance work convenient. Mike installed windows on the north and east sides for cross ventilation when the west-facing front door is open. Four windows on the south side make the parts-storage room bright. He wired plenty of lights and outlets for illumination even at night.
Walls are white to reflect light.
Six inches of new concrete make a stable working base. And Mike installed a floor drain to take away water, ice and snow. A compressor sits on a shelf over the parts room door. It's off the floor and out of the way.