Wow! It seems to me that you have a busy industrial area here!
I'm not very good calculating in feet and inches. 30" are about 75cm, but, how are 11'? about 9 meters? Thats a LOT of real state!
You're very fortunate If you can dedicate this space to your layout!
The most I like is the very well balanced that are the buildings. Putting they at the corners have the effect of no visual crowding. Nice.