Decided instead of purchasing a generic switch tower to make my own, modeled after the Essay tower on the NY&LB.
Fortunately, I was able to come across scale drawings of the original (actually from the proposed construction, there are slight difference between them and the "as-built", but the proportions are correct).
Since I'm working with a resin printer, the walls and roof prove too large to print without piecing them together, so they're going to be styrene, with cutouts for the doors and windows. The doors, window frames, gutters, downspouts and chimney top will all be printed. The top two floors will be made separately from the cellar level, since I don't yet have a layout where it will reside, and the cellar may need to change depending on if it's set on a hill, or has a hill built around it.
So far, the windows were designed, printed, primed and painted...