I would have thought that cold calling would be a bit more successful since human interaction results in greater relationship/ trust building than the other methods.

USD is geriatric in the ICU hooked to a million tubes and wires like a human-vegetable to keep breathing.

Only butting in because this can be a big deal, there is nothing more, besides the paycheck, that is appreciated more than tangible recognition for a job well done, it strokes the ego, and for workmen who take pride in what they do (The Pride of the American Worker) it's important.It sets you aside from being an employer to being a friend as well.It sets you aside from others they may work for.If you have an emergency or a really short fuse on a deal and you call them, it's just human nature to help out your friends or best clients ahead of others.

The Federal Housing Finance Agency, FHFA, the governing body that controls the conventional loan world. 

Quote from @John Warren: Our minimum criteria is 600 credit score or better, income of 3X the rent and no criminal or eviction history.John,How is the Cook County Human Rights Commission rule on not asking about convictions until after financial qualifications affecting your operations in Berwyn and Cicero? 

These were not tenants of mine but after I bought the housesI think human urine is worse though.....in large quantities.....?

Humans are not robots and they eventually will do want they want.  

That physical asset fills one core human need, which is shelter.

You just have to put up with crooks, con artists, manipulators, the occasional prostitute, overdoses, break ins, riff raff, dead bodies, and every now and then the psychotic mutt renter.

Creating systems, to leverage human power to remove yourself as maximally from those items that are a drag on your time from your primary, highest ROI actions of your time.