Basic city models

I've been working on figuring out the basic structure of my city and I've been doing it in Maya, which has been much easier creating something in 3D and being able to see the results from all angles. Below are a few of my first tries each time I built it up a little more until I think I finally have my final basic structure to add all the details to.

Here is what my final structure will be. Now I just need to add all the details to it and hopefully I'll have my final design.