This is a more time consuming process because time and work needs to be done to fix up the home and money needs to be invested into rehabbing. 

You may find many frogs but the Prince applicant will cause you fewer headaches.Good luck with the screening:)

And that's probably to do with it being customary vs actually that time consuming...

There are more billionaires now than in 2016 so it would be time consuming for me to determine what percent of them had significant RE holdings.The top of the billionaire list is full of entrepreneurs as you indicated but in 2016 just over 10% of the billionaires had significant RE holdings. 

Profit has to be made in order for those products and services to continually be offered, improved and consumed. 

If I am correct in my assumption, then my best advice would be to dump those and use a 1031 exchange to leapfrog into solid B/B+ cashflow properties, even if it means you have fewer doors.

As another person posted before, if you as a buyer want the property then the fewer contingencies the better, all cash, no inspection, close in a week... that gives no time for a second buyer to come along.How do you prevent your time being wasted? 

Well maintained properties will lead to fewer urgent service calls and less property damage.Identify opportunities for property improvement.Clarify your expectations and tenant expectations.

Our priorities changed and I have been ravenously consuming FIRE media for the past year.

That is a difficult and time consuming process, and just a small part of the value us list providers offer.