I've been working on my brew house. It is in one end of a 12 X 25 ft. Amish built barn. I just finished a 2.5 X 6 X 2.6 foot fermentation chamber. For cooling, I'm using a 9000 btu portable air conditioner and a small electric heater controller by a STC-1000.
Before winter, I hope to have propane plumbed up in the building (for heat and also for a hot water heater) and also to get water run to the building.