Short update this weekend, there is more to come, but only a few "screenshot worthy" images.
In one of the satellite reference images I have for the power plant there is one of these cheap looking modular commercial buidlings stuck next to the plant. As this map is fairly open I need all the buildings I can get so I modeled this one using reference photos and a floor plan I found for a similar building.
Next to the power plant is a large power relay station. It will have quite a few custom models, but each will be kept fairly basic as they are going to basically be background scenery.