I am extremely choosy about exactly how much work I want to do, where my property is located specifically, and many other characteristics of my investments.

@Michael Plante I think there's a couple possible reasons for the scenario you described (which I agree does happen frequently)

Its not used because, and at least from my limit experience, I've never come across two investment that had such similar characteristic that I needed to get that level of precision in my measurement.

Does Rochester have any special characteristics which would make investing in ratholes better or worse? 

When I glance up at the balconies of each finished or soon-to-be finished building, I frequently see that two thirds or more appear empty (while the others have outdoor furniture, bikes, etc on them). 

This is an unfortunate, frequent occurrence when a residential agent, whose experience is selling pretty house to Dick and Jane, catches a {small} commercial property.   

The report points out discrimination related to disability is easier to detect because the discriminatory action often involves denied requests for reasonable accommodation.The second most reported type of complaint was discrimination on the basis of race, totaling 18.5% of all cases.The study also reports that housing discrimination occurs more in the rental market than any other types of real estate transactions, as it’s the most common and frequent type of housing transaction.

If you set up a tag for Dayton you see it's discussed pretty frequently.

You'll want to be sure that you know what their damage is before buying because when they come to do the inspection, the owner frequently has to make the repairs.

I travel frequently to Newark, Delaware for work though, so my initial search area is the area west of I-476 in PA to Newark, DE.