I personally think it is a great portion of the NG to model. It is what I have considered when my time comes for a larger layout. Gato and Monero are two fantastic locations to model. Carbon Junction would be a great place to have a lead to hidden staging for the Farmington Branch. This would allow you to run long pipe trains but not have to model the entire branch if you didn't have the room to do so. There are several rail served business to offer switching opportunities. Sawmills, fuel oil, cattle, coal and LCL just to mention a few. Another plus is that you would have something unique. Most people stick to the same old sections of the NG to model.