You each get a 512x512x512 area to build whatever you want. Make it as nice as possible with textures, lighting, and models if you have them. All of these swatches will be compiled into a map for all to see. Like the rooms maps but a lot smaller and manageable.
The floor of your swatch can be below your plot. Just make sure its a solid 512x512 so it lines up with the surrounding floors. Don't worry about accessibility, though it is a plus, walking space will go between each cubicle.
Give it a try, its just a small area to fill.
I think it would be ok to do more than one plot if people are willing.