Hi Ken,
Love the yard you picked. Bill's diagram is very helpful great also. I am in the same boat you are with lots of trolleys and electric but, no home for them yet. Since you are doing primarily trolleys, how are you operating them (3-rail, 2-rail, overhead wire)?
If you are using overhead wire or 2-rail, you can get very close to your yard prototype in a small space by using Lou Cross's (Right O Way) single point girder rail (street track) turnouts (or something similar) point and mate which are code 125 and just beautiful pieces of work. They come in 4 pieces, point, mate, tongue and a cover for the mechanical box. I am using them now building a Christmas themed village with trolleys. Takes a little work to hand lay them (I am cutting them in to code 125 flex track) but, they look great and run well. I have a couple more experienced modelers helping me with the build.
I inserted a drawing that is designed as an end of the line LRV yard with a loop and station. It will accommodate several cars. For this I had a custom ladder built by Signature Switches as a single unit because of the tight turn radius for trolleys, the were not going to be in pavement and to keep the yard spacing tight. This is the module next on deck after the Christmas Village.
Below that is a basic "Barn/Loop" module I designed using 9" radius curves, perhaps it could be helpful for ideas for you. It is much simpler than your prototype but, for what I need it gets the job done with a good bit of storage.
Separately, East Penn is having its Biennial Trolley Meet in Philadelphia on May 15 & 16. There will be lots of operating layouts, exhibitors and lots of folks to talk to about your ideas and ask questions. This show is all electric traction. Here is a link to the Trolley Meet site. Also East Penn's site has lots of useful tips on there as well.
Hope that helps, love your idea.
Chris