RE is a get rich slow game and there are increasing number of people talking about how difficult it is to retire from your day job even with large numbers of rentals because cash flow is thin.On the one hand there is the Small But Mighty portfolio mentality which I believe is a book in the BP store by Chad Carson.

Also remember that we are getting to the slow months to lease up properties and it may take a while.

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.

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. 

I think a slow-and-steady approach is great, especially as you learn the ins-and-outs of the market.

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.

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. 

My aim is slow and steady net cash flow. 

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 ..

Yet deep secret s inside places ud never hear about yet they live tight next to you ....this is only because you know and can point 👉   ...it true , it's double punishment and does put lives at risk ..people they live with when vigilant groups do this type of stuff,...yet the guy who killed 3 people cause he likes to drive an drink is watching it all go down next to u waving at u,...just saying ,..u still being punished for what u done ?