It's a mindset that beg's the snake-oil-salesman to enter the picture. 

Build - rent - refinance -repeat. in columbus ohio you are buying old houses that are 1900 or 1920 or 1940 and you are in a sellers market. on the other hand you can source land which is a buyers market and build single family homes or duplex or triplexes that will return by renting and pulling cash out on a DSCR loan and doing it again. there aren't a lot of strategies that do this. flipping is different. so many risks. but when someone has a well oiled machine it's all good and less risk.

They are in the Oil and Natural Gas industry; previously, they were known as Phoenix Capital.

It ran off of used vegetable oil that I got for free from restaurants. 

I am not saying the content provided is not valuable or what I will call the "guru selling snake oil".

If it's dry, cover it with a oil based primer, then 3 hours later paint it.

I.e. fixing holes in walls, ripped carpet, oil replacement at tenant costs.  

It won't be the same as an oil shock, dot-com bust, GFC, or COVID, but something will happen. 

But this is how I did it with oil and gas

If we don't protect it we won't have any oil".