I've been talking to JetStream designs about BNA, they seem quite interested in making it. I reside in Nashville, and yes, it is quite hilly with a runway that cuts through a busy highway.
How's the project coming so far?
I would love to see some more screenshots.
You should consider trying to make that bridge that connects RWY 02R/20L to the rest of the airfield.
I've flown into BNA many times, and I would love to fly there in the sim.