And as in your case, PM does not always mean one person - it can be a compilation of team members assisting you to achieve the desired end result - excellent tenants who pay on time, take good care of the rental, stay a while, and aren't a major PITA :)

I can definitely see someone out there compiling a list or database (MLS) with all of these numbers and I can pull a running trend for all of that data, insights and what things seems to affect sells and rises in markets.

Also, you can call and build a relationship with one REO specialist and they'll typically have a list already compiled of their colleagues and even if they don't they have access to their MLS's database and can typically export that list into a spreadsheet.

@Patrick McGowen I recently compiled a bibliography of financial literacy books for my college library.

Take a look at some information that I have compiled about the quality of Cleveland neighborhood's HERE

You are also concentrating on a speciality market, multi family ,which also narrows competition.Also begin compiling a list of properties and find a realtor to show you some property This way yo will get a feel of arv,mv, and how to price repairs etc

You can pull yourself by reviewing publications for death notices and legal notices of pending estate and then researching if decedent owns real estate in your market, Or, go down to the courthouse and pull case files to find real estate.Lastly, if you calue your time more, pay a researcher to pull Giles and compile data to your specifications. 

You can also buy lists from companies like list source and there are some REI software companies that have a cash buyer search feature.Some of best ways to find motivated sellers is to purchase lists from companies like listsource and or compile lists from city and county like 60-90-120 days late on mortgage, pre-foreclosure, delinquent taxes, water cutoff, code violation, probate, divorce, etc.

Even the gurus who now mooch off others worked extremely hard to get where they're at as @Jon Holdman mentions even those who do find success in their programs are very few in numbers and compiled together.

If it isn't KW, compile a list of backup brokerages and ask around or lookup what agents are saying about that brokerage and schedule meetings to see who would be a good fit for you.