I made mine 45X45 with 2 ea 14X14 doors. Wish I had made it larger. Sloped the floor 1/4" towards the doors so I can wash RV inside. RV is plugged into 50A. Made floor 13" thick.
Made work bench 45' long and laid out lots of tools for easy access.
My wife and I installed the Blue Ox baseplate on our 2015 JKU in about 2 hours. Easy but takes 2 people. Yes, I do have a car lift in the workshop.
We transferred our BB from a Durango to the Wrangler.
I received great service from St. Lucie Battery and Tire in Ft. Pierce for the same size tires. Orlando is too far for routine tire replacement. Plus, my old tires were placed into my utility trailer as I had already sold them to a fella in WPB