Lenders also loved them because there was growing cash flow from the rentals to provide more lendability.

My inclination was to sign up to get the systems in place so I can easily grow into them, but it didn't seem to provide enough benefit to justify the associated costs. 

Yes here are some good books to read   The Millionnaire Real Estate Investor, Think Rich Grow Rich , Pareto Principle etc

Also of all the prospects that call we rarely if ever get one calling "wanting" to move to the OKC public schools areas.

To grow your network and get insight from the experiences of others, go to local real estate meetups, networking events, and seminars.Seek out a mentor with knowledge of subject-to transactions and wholesaling.

Pinellas County, FL, offers great opportunities for house hacking.It's completely understandable to feel overwhelmed at the beginning of your journey, however that is normal and you're in the right place to learn and grow.

Feel free to message me because I’m here to learn and grow  thanks!

Hey Shola, totally can relate with you being from an expensive real estate market - I moved to Columbus a few years ago (from Portland, Oregon which was super expensive) to become a full time real estate investor, and ever since, I've completed quite a lot of BRRRRs, flips, and own a successful rental portfolio here in Columbus Ohio.

I believe all that's ever been mentioned on the topic is a "reasonable" salary.

If a city wants to ensure landlords meet basic living conditions as a requirement for permitting that commerce, fine - but no tenant should *ever* be allowed to live somewhere without paying the rent.