Just found this thread. As I read through the pages, my main worry was your thoughts on putting a 2-ton AC in there. Glad you reconsidered. A 2-Ton AC would have been way overkill, uncomfortable, and cause big fluctuations in temp and humidity (things you don't want in a room full of wood and tools.)
I also have a narrow shop, albeit a bit longer than yours at (11' 5" x 48'). Definitely presents challenges. My sliding table saw, jointer, and SCMS station are all stationary and control the center section because of the length they need. Everything else loads up the walls, keeping the center aisle clear. Other real estate hungry tools like the bandsaw, planer, widebelt, shaper, and router table are all on wheels and can be pulled out to the center aisle when I need them and pushed back against the wall when not in use. It works, but I do wish I had a 24' wide shop. It wasn't an option for me, unfortunately so I make do with what I have.