Mine had a snow load of 56" and wind to 120mph. i did a pole structure to keep the cost/taxes down. We added 2'x12's at the base of the walls for the concrete floor that was poured after the building was finished. I did fibercrete and the floor did crack in some areas.
Not sure about WY but some counties don't allow wood stoves in garages. Insurance cos are leery also. Radiant floor heat is nice but I don't know the cost. Water is nice to have, even if it's a spigot, with a util sink, that drains out to the ground. Get one of those all weather spigots that shuts the water off below grade. Go Pro Panel. The quality is better. Add more outlets than you think you will ever need. I got the cheap 11'x16' garage door and hated every minute of it. Get a sturdy door that actually seals. I got a 3'-4' apron and wished I'd gone for at least 10'. I didn't insulate (aluminum bubble wrap was it) and wished I had. Adding walls (thin plywood) would be something I'd also do. Shelving? Lighting?