T’were it mine…
I’d pull that track, and re-lay it in a tighter radius, so you have room for structures on both side of a single spur. Of the two curved turnouts on our layout, one was pulled, the other is never used, it is non-functional because not one of 50 locomotives can cross it without derailing, Peco, 17" inside radius, 19 inch outside radius.
Then I’d stuff an industry in there that could grow over time. Something that could end up very complex, with a bazillion tiny pieces. A lumber yard, suggested earlier, could be such an industry, but there are others. An office, one lumber shed, maybe a sawmill, these could get you started, with a gravel and weed infested yard around it, but over time it could grow up to be densely populated with buildings related to the expanding business. A foundry, with a shrinking scrapyard around it, to make room for more buildings, is another idea. An industry that supports a rail maintenence facility, like a coachworks, is yet another, since your enginehouse is close by, and it’s obviously a heavily industrial area.
Goal is to get the area looking “finished” as soon as possible, but to allow for the most modeling pleasure over successive years as possible. Below a certain radius, you will have to consider short freight cars and motive power. That may rule out a coach works, I can’t tell radius from the pic.
Can the pink car be painted? Weathered? Does the contract specify it has to appear in each photograph? Can it be part of a significant train wreck, with explosions and fire? One clause in my contract has Dr. Suess’s “Grinch” train on our layout, but since ALL trains are usually parked in hidden staging, it’s not a real problem. As I often note, the “real good” trains shouldn’t be on permanent display, they have…more “impact” when rolled out unepectedly, and on “special” occasions.
YMMV.