Would have done this differently . . .

Assembling the steps and the knee walls proved to be tedious.   Since I was working off 3 bank buildings and I needed 4 entrances, I had to fabricate the 4th knee wall out of pieces from one of the bank fronts, and made the steps from 1/8" masonite:

The challenge was to assemble all the pieces straight and square and glue them together with CAA.  If I were to do this again, I would only use the knee walls and top step from the banks, and fabricate the rest of the steps from the 1/8" masonite.  

I cut the decorative triangles off the tops of the doors and glued on a strip of styrene to fill the gap on top.