Are you referring to reducing vacancy or increasing other non-operating income in order to increase cash flow?

NNN ensures property expenses are covered,   It reduces risks associated with managing the asset.  

Say, the plan is to invest $20K/unit over the course of 3 years, the lender can fund all of that capex thus reducing the amount of equity needed from the sponsors.

Fannie Mae instituted a new guideline, reducing their % of investment loans verses owner occupied loans....this may be affecting you and the market.

That's why so many owners sue the county to get their property taxes reduced.  

I recently purchased the book How To Invest In Real Estate and so far i have gotten to chapter 2 but just from what i have read, it’s full of really good information and stresses so hard to be consistent which I already am because of my own personal hobbies like weight lifting and skateboarding.

What’s the worst thing that can happen, what’s the likelihood of that, and what’s can I do to safely reduce that risk.

I know Ice makers and water dispensers are the number one thing that breaks on fridges and not having them would reduce repairs.

Reduced rent for direct deposit tenants?

Why not look for a duplex, reduce your living expenses to free up cash?