Will the city skyline give the great feeling of a North-American City? I hope so, finally. Time is come to setup some sketches and mookups of building that could create and be part of the city skyline.
The elevation between the floors are important, and it looks like a standard elevation in commercial building is 10 feet, about 3 meter. In Z-scale, 1:220, I think 15 mm elevation would be fine. Commercial kits looks like they are much bigger.