It's almost a cultural gap! 

He is a piece of crap human being...It's American culture.

You need to know the cultures involved, the income levels involved, who would be likely to rent your unit and what they would do with it and how likely they are to stay and not cause problems.There is no mathematical formula that figures that into the equation, so to speak. 

-Culture of the group - this is established by the leader.

Hopefully that's well behind you...I've long said that it will take big money lobbyists (likely from the air travel industry) to push into motion some type of regulation on ESAs, Service Animals and the likes.Hopefully this is just the beginning of the process of getting these animals on a registry with a proper license that can be verified by anyone.I've raised two German Shepherd Guide Dogs through the Fidelco Guide Dog Foundation and have watched a shift in our culture around ESAs and Service Dogs over the last 2.5 years.

A combination of HGTV culture and American ASPIRATION has “spoiled” them into believing they deserve better than living in a small frame apartment, no stainless steel appliances, no hardwood floors and/or no in-unit washer/dryer but saving $250/month.

What's amazing to me, is the amount of BS you have to deal with, when your properties are cheap, so many fake pay stubs, sketchy people, it's just different--  Different culture, different mentality, I'll just warn you, it won't be smooth sailing.     

Not sure if that’s the reason in your area but one reason people don’t like investors is the rapid gentrification of an area which alters the local culture and makes it unaffordable for the folks who grew up there/lived there for generations to stay.

Finally, it wouldn't be too much of a stretch to sue BiggerPockets itself for failure to provide adequate forum moderation, leading to a degenerative culture that has caused significant emotional distress to you. 

Going forward it will help if you know the (C-) lifestyle and "Culture" for the area you are renting out.Buy here--pay here vehicles, Rent-to-own furniture (at best), friends and family with "Records" (not the vinyl kind), Dead junk vehicles awaiting some never to happen repair, financial tightness and sometimes irresponsibility, rely on friends and family for help, etc, etc, etc...If you know and understand your "Customer" it will be easier to make money from them, than if you expect them to behave and have the same level of lifestyle and financial responsibility as B+ renters.In other words, don't expect a Camel to have no humps, and don't expect it to be a horse.Just my 2 cents.