Dude! I just noticed this thread! Looking great man! Love that you got 220, 30a out there. I'm really kicking myself that I did not run more amps out here to the mancave. When I built it, I had a suspicion I would later add a brewery on, but never dreamed that I would want to ever go electric. some day down the road, I may be running a dedicated brewery service out here.
I also really like you use of Durarock. I plan to do the same by my burners, and sink. Can't wait to see some more pics of it.
BTW, whoever if was that mentioned buying a shed.....Do it yourself. It's a LOT cheaper than buying a package. I have somewhere between 3500-4000$ in the mancave. It's (16x12, the main part) And that is finished. Insulation, drywall, wiring, paint, flooring....I could not come near a 16x12 prefab, and then finish it for that.