I have read "How to win friends and influence people", "Influence the psychology of persuasion", and "Influencer the power to change anything" also, I know these tactics. 

A smart lock on wifi with no intervening Zigbee/Z-Wave or Matter hub will eat up battery power.

As you run your business, you may have to buy a new roof unexpectedly, or replace the hvac system unexpectedly, or replace kitchen items on a turn because they've been destroyed or reached the end of their service life.

Benefit: Defers capital gains tax, allowing full reinvestment into a new property.2 very powerful tools! 

This effect is very powerful.

We run a 53 acre ranch in the middle of Texas, and the stress of unexpected problems coming up with not enough time to resolve them (septic, water lines, other equipment malfunctions, adequate pool maintenance) between guests is too great.I'm aware there's money left on the table.

Added a power boat and rented it along with the weekly house rent.

Power stripped 60 years of paint from the floor-to-ceiling river rock fire place.

You most definitely can go in on a Fourplex with 3.5% down, primary residence, living in one of the units, find out what purchase power you have, and what the rent rolls for the other units will be to determine your cash flow. 

There’s not much time to hunt for a better loan, and this option helps you save cash and increase your buying power.