In my experience having mutli-family properties have not been a factor in getting a loan for a single family.

Idea of long term buy and hold investing, building up equity & future cash flow.

I currently have 16 doors. a 9 unit studio building, a quad with 2 bedroom units and 3 SFR .

I recommend Sullivan County New York . for that price , you can buy an apartment building with a dozen doors or seven single-family homes

What if I am not only looking to do quantitative analysis but want to consider some factors that are more qualitative?

That's awesome that you want to keep investing and building that real estate portfolio.

A large multifamily building with one unit dedicated to management living.  

The project got off to a slow start with the building department.

After 5 years dabbling in STR's, BRRRR's, and flips, I'm ready to focus on one area and asset class, scale up, and build a portfolio that I can eventually retire on.

Build cost 2 million ($240 per square foot for a 5400 square-foot duplex) (Sale price $650 per square foot valuating the duplex at 3.5 million) Upon stabilization, the properties market value is projected to be between 4.5 and 5 million.