I'm just a the very very starting point, decided I needed to do some mock ups just to get a feel as to how the city will fit into its designated area, looking at basic questions like orientation of road, background structures, a good height for tallest buildings, etc. The city will be on the second level which is 60 inches, so debating about how high tallest structure should be, keeping in mind lighting valance which isn't up yet.
So my first structures will be very basic probably without windows, just do I can get stuff up fast so I can begin to properly plan for what I will be eventually doing. Also these mock ups will be my first tentative steps to building high rises.