That first property has generated a pretty decent cash flow, and we just closed on our second single family rental in March 2018, located in Wake Forest, NC. 

Looking to do buy and hold  investing on small multi-family and single family homes where there is value add.

To answer your question: you should consult with an incorporation attorney to determine if single vs multiple LLCs are right for you as far as mitigating risk or other issues.Congratulations and I wish you nothing but success, Spencer.

If you can do it for a single family, you can do it for a duplex.

Too risky to trust your money to any automated system.The sales comparable approach to value will dominate regardless of cash flow if it's a single family home or 1-4 units and is being financed. 

I am looking at getting into rental properties both single and multi-family.

After that, I am undecided on multi vs single family, but have a feeling that multi will dominate, as I am always looking for bigger and better.

I'm surprised you can't find a single person who knows how a wholesale deal works. 

I am located in central Arkansas and plan on starting with single family homes to buy and hold.

I am going to start investing in single family and multi-family homes.