They are very popular and have pointed out all the possible hidden problems that flippers usually find that a inspection does not uncover.

Domestic,  Unless police were called also for noise or other issues were uncovered when they responded for complaint,   you do nothing.  

We agreed there is probably about $600,000 in value to uncover during these next 3 years, particularly in better collections, controlling energy expenses, improving cosmetics, and rehabbing units on turnover.

I'm going to try out the Canada Post mailing list generator as a starting point and see what other sources I can uncover. 

I'd search through the lease and other items associated with the property to try to uncover more about how this manager runs the entire operation.I think you'll also want to do a little more digging specifically into the pet situation:a) Did you or the previous owners receive a pet deposit?

Should property buyers now ask sellers to put up money to cover costs, in case something unfavorable is uncovered while in contract?

Sometimes you can uncover that amazing gem, but usually not.

I would also wonder why the first rehabber did not finish...is there more than the initial inspections/estimates uncovered?

Network with delivery people and see if they know any houses that are vacant, ask agents to help you uncover keywords in the mls "must sell quickly" "as is" "fixer upper".If you have a little money to get started, do an inexpensive mailing postcard, black & white through usps.com with a compelling message and mail it to a targeted list of people that may need a quick sale. 

Without exception, every episode of "Flip This House" that I've seen has a portion of the show in which almost immediately after purchasing the house and beginning the rehab, they uncover some sort of problem that they didn't budget for.