Here's mine (built for the largest RV, which I don't own, but for resale).
Plenty of 110v outlets, flouresent lights, 220v outlets, phone, water, stereo, refrigerator, storage in attic and in loft above bathroom. This time I got stairs to the loft area so no more falling off ladders.
In the winter there is a commercial size furnace and in the summer, they ceiling fan and turbine fan move the air out the two bay doors. Build yourself a large workbench with low hung lighting over that.
The lift is what I consider a mandatory tool in any shop, especially if you have old tired knees. Mine is the SUPERIOR 7000# four post, but in hindsight I wish I had chosen a two post lift again for the versatility of a two post over the more convenient four post. The compressor is next in my priorities of importance...well, right behind the bathroom.