When I played the Mass Effect games, I got kind of infatuated with the modular design structure of the colonies of the Earth Alliance. So I decided to put my own spin on the whole thing, and this is the result.
we have a greenhouse on the left, a small apartment in the middle, and a large apartment on the right. All moules are connected by "linking towers" - basically hardpoints fot an electrical grid or something. I´m not sure about the scale, but I would guess it lies somewhere at half between minifigs and technic figures.
Greenhouse with several plants
small apartment with gardening area and sky windows
Check the LDD screenshots below for some inside details. Some of the furniture (the beds) comes from a different model that I´m planning to upload some time later.