Although I haven’t done a deep dive yet.  

While your coworkers are at Happy Hour or football games, the REI may be knee deep in it.

The tenant finds out that the insurance company will be fighting this with their very deep pockets.  

She had too many belongings and it is really hard to quantify clutter much less cleanliness.This to say that one deep cleaning may help get them on track, on-going visits may be successful, or you may need different tenants because a lot of people don't know how to clean.

It is really a good thing for those of us who chose to take the journey together.But not everyone is cut out for the note business or is really ready to be that deep in it, for those that do, it is really worth the look....M

Read books like Set for Life by @Scott Trench and Start with Strategy by @Dave Meyer to get the mindset of starting on the table before going too deep into an asset class or something like flipping.

Train with the one thing you have with you all the time FIRST and then go to external weapons if you like.I hear all the time from some 400 pound fat guy they have a gun and go to the range once a week but if they walk more than 20 feet they get out of breath.  

There's nothing left to cover expenses so you better have deep pockets to cover maintenance, admin, turns, etc.If you think you can quickly improve rents to a point that covers your expenses and pads your pocket a bit, then maybe, IF it hits your return threshold.If you're buying cash, then the mortgage is not a factor. 

OP Google Dwags  security systems for houses.. only way to keep folks out.Also as @Drew Sygit Drew suggests in D class or deep hood areas which is what your describing no one puts in mechanicals until the day the tenant moves in or MAYBE the day before ..

Shallow vertical oil wells can have pretty small pads, while some deep horizontal wells with multiple holes can have some probably 10 acres.Minerals are superior to the land, so while not all that common, so someone who just holds the land, but does not have a good surface rights agreement could find a drilling rig in their backyard.