Sorry for keeping everyone in the dark for so long. I had to put the project on a temporary hold as classes started getting harder (I am taking Organic Chemistry 3 and Microeconomics, while in the early stages of moving from the Greater Seattle Area to Eastern Washington. However, I have gained modeling and texturing (and UV mapping) skills by making a couple of mods for Cities: Skylines. As soon as I have a full day to sit in front of a computer with minimal distractions, I can make all 5 tiers (basic stone abode, nice stone rowhouse with dormers and glass pane windows, 2 story Georgean rowhouse with dormer, 3 story Georgean rowhouse with dormer, and 5 story Italianate rowhouse with basement), with 2 unique models (and their mirror images) for each tier, and 2 texture variations for each model (the 2 rowhouse models with doors on the left will both use the same 2 texture variations (but be mapped differently) and the rowhouses with the doors on the right will use the other 2 texture variations). I am thinking that Sunday will be the best day for me to do the modeling and texturing and for me to make some minor tweaks and coding once CC 1.4 is released. I might also make a brick tenement as an upgrade for the Bunkhouse but that will be for the second released version of my mod and I might eventually create variations of the buildings so that the ground floor would have a shop (but that would require models that overhang their footprints with the housing and shops fitting together perfectly in every combination).
However, I should be able to crank out the 40 assets (5 tiers with identical stats, each tier having 2 different models (each model having a mirror image, each model variation having 2 texture variations) by Sunday and share renders of them here and in my thread on Colonial Charter's forum by Monday. If I have time after that, I might make a brick tenement in either Jacobethan or Victorian style (but be simple and look like it would belong in Philadelphia around the time of the revolutionary age).