Greg, the type of coaling station shown in the FSM ad is very rare. That type of coal operation was much more common for use in industrial facilities, where the coal was dumped into pits and then transferred by screw conveyors to boilers. I'm not saying one like that didn't exist for locomotive fueling but it certainly wasn't common. The grade up the dump trestle varied depending on how much room was available on the spur but they tended to be pretty steep. Seven or eight percent was common and ten percent wasn't unheard of. As you might imagine, one or two loaded hoppers is all that would be handled up such a steep grade.
The Bachmann coaling tower on the right is not that far off from the more common railroad prototype. It needs an unloading spur running between the legs of the tower, a dump bin between the tracks, and a hoist house for the machinery that gets the coal to the top of the tower. The twin dock coaling station shown in your center photograph was also not common except on big railroads like the Pennsy and NYC. Most railroads used single dock coaling station out on the line since there was rarely enough space for a twin dock coaling tower. I've seen a number of those Bachmann coaling towers kitbashed into some pretty nice replicas of the real thing.