It's because it's undesirable and no one wants to live there.

When you consider who your tenants will be, vacancy, evictions, and maintenance that are part of owning property in an undesirable area, the reality can often be negative cashflow. 

They are also completely vacant and in very undesirable neighborhoods with boarded up houses next to them.  

It's cheap because it's undesirable and will attract undesirable tenants with higher maintenance, evictions etc.

An easy tool to get rid of an undesirable, gone.

I can get someone out to visit a property to vet it for me, but I'd have to set up all the peripherals like management, maintenance, etc.

1) Research Zoning of similar property2) Do search with same zoning criteria with propertyradar or have title company give you a list.3) Possibly filter by satellite photos to eliminate undesirable topography.

We finished the townhomes, and once buyers moved into the homes, that block instantly became slightly less undesirable.

A Lot of turnkeys are going to these undesirable spots and its highly possible you'll end up with more liability with turnover rehab requirements.

I associate it with owning undesirable properties where people don’t really want to live.