That is, until a few weeks later, I receive 12 notices from New York State Division of Human Rights that a local non-profit have filed 12 complaints against me on behalf of 2 individuals for "discrimination" of source of income.

I took care of it.I also recently sent out rent increase notices, and now I got a request from a different tenant to replace a refrigerator because it's "rusted on the front and side."

@Nick Moriwaki, did you notice that I used the word "payment/s"?

If you like your gig and making money from it.Real Estate is first purchased as an investment.Any potential tax decrease is a plus.Comparing real estate with other investment types such as stocks / bonds, real estate will likely get you the best after tax return.

The leads were not great like you said and I also noticed Bigger Pockets has a button that says "Contact all 5 featured lenders".

It seems that Dollar General, although they decreased # of stores open this year, are a stronger brand than FD/DT.

As Greg said, as soon as they owe you money, file notice to quit and any rent that comes in after that is put towards the monies owed first.Under no circumstances would I extend or renew their lease. 

I don't know if any of my experience will transfer to your country, but I have noticed over the years that despite the number crunching and research, real estate is ( for me at least ) a people business.

Only issue I see (I am huge into data for my day job so I run numbers on cities on a regular basis) is that there has been population decrease in last 5 years.

What we have noticed is that sooner or later, most of the homeowners end up converting to full service.