What further analysis should I be honing in on and key factors/metrics/info that may be providing inaccurate numbers?

Kitchen cabinet handles were placed upside down, cabinet doors were installed backwards, electrical line for thermostat was ran on the inside of the bedroom exposed, trash swept into newly installs vents from the furnace, cracked tub, wall switches were installed sideways in some rooms, wall outlets were installed upside down on some walls, list goes on.

I would definitely factor in some substantial capex/ maintenance and repair costs which could lower your returns.  

One thing to add is that when you buy a new build, your PITI will likely not be factoring in the correct state tax number.

@Damon AlbersI hate the alphabet rating system because it is such an arbitrary thing that boils down many important factors to one letter. 

See, when building a portfolio, appreciation is key, and the #1 factor that will dictate things.

I still think this is just like factoring accounts receivable .

Nonetheless, I am not out to impugn anyone's intentions and I do understand (as Jay rightfully points out) that the self-employed (my situation for the past 20 years) especially run into times in their lives when conventional lending sources are of no use due to limited reportable income and other factors (such as when, for example, you retire in your 50's and begin to live off of your lines of credit, etc.). 

@Theresa Amouzou A lot of factors go into finding good deals.

I'm not a typical Realtor perse looking for clients so I don't need the trust factor that may go with the REALTOR symbol in my marketing or anything.