After a long pause for wiring, I'm back to laying track. I managed to save up enough to purchase the rest of the track for Rico and the Enterprise branch, and have completed about 1/2 of the town's industrial trackage already.
Once Rico is complete, that'll leave only Dolores and Durango for major track-laying work. Ridgway is done, except for the engine terminal, which is waiting on the turntable, which is waiting on funds that - um - aren't available yet!