Train interior almost done
First class seating

Long hallway shot

Junction between two cars

Engineer cabin

Overview of entire train

Nonrendered (material only) passing through train

20k tris so far, plan to keep it under 22k tops. Doors are animated and can be opened with buttons using interactive vehicle support. Kinda hoping to find a way to disable mounting so players can walk through the train.
EDIT:

Coming soon to a stuffty community RP near you