Joey on Rails

Here is my latest trackplan. It is based on the Blue Creek Railroad and on plans from John Armstrong's Track Planning for Realistic Operation. I'm leaning towards the ??? becoming a dairy farm. I can drop off grain and empty tanks and leave with full tanks and empty grain cars. The green area is base level, the black area is at 2 inches and the yellow areas are 4% grades. Underneath the black area is a passing track and a hidden staging track. There is also room for expansion off the upper left and lower right