South Carolina (where I live) is a great state for many things but not rental real estate.  

On a daily basis I get questions from investors/property owners about the rental rate for their rental property.

My long term rentals may be boring but they've made fantastic returns.

I have Section 8 rentals in my portfolio but I do recommend connecting with a property manager who specializes in Section 8 rentals - they'll know all the specific requirements, inspections, and paperwork needed. 

Is this for mid term rentals?

I have a w-2 income and own three properties, all long term rentals, that I've had for a few years.

In some cases, after running the numbers, I’ve even faced potential negative returns, causing me to miss out on promising deals here in South Florida.That brings me to my question: I currently own two homes—one is my primary residence, and the other is a rental property.

Quote from @Quan Pham: I'll give you the easy answer: sell.If you were fired up about owning an investment, I would recommend keeping the house as a rental.

I rent through Furnished Finder which has a standard rental contract. 

To achieve REPS status you need to be actively involved in your rentals.