Considering an RV Garage

I'm in the process of finishing my "dream" garage. Just finished the ceiling yesterday and all that remains is installing two large ceiling fans. My rv is a 30' C so I built the garage 45' long for space to maneuver the rv. It is 30' wide and 14' high. The electric door is 12' wide and insulated. I used 6" lumber for the added strength. It has one walk-in door but no windows nor any plumbing except for a drain in the center of the floor. I sprayed insulation on the walls and cellulose on the ceiling so it won't take much to heat it. I installed 6 large lighting banks that hold 6 powerful fluorescent lamps in each. I built a workbench across half the back wall. As I said I keep the C parked on one side with room to open both slideouts and on the other I park my restored Tbird and my Corvette. In the space in front of the C I park my golf kart. In the center I built a 16' train table for my grandson. With the extra length I have a lot of room for storage at the rear of the garage and along both walls. The white metal ceiling just installed yesterday reflects the lighting downward making it brighter as a result. Be sure you install a large enough electric box to do the job if you will be using such things as heaters, fans, compressors and the like. Consider the placement of your outlets and what amperage you need. Electrical components are very expensive. You will no doubt have to store your materiels outside while building so buy insurance on those materiels and once done you can drop the coverage.