As a bit of fore sight, My business partner and I plan to scale the business to have employees.I am currently paid through my llc for selling homes, but the issue is that when I am to be paid for services of property management, the funds have to pass through my managing broker's office. 

As a result, my primary duties were to determine (often through specific communication with the direct local municipality or planning individual) whether a property could be utilized as a vacation rental. 

Planned on probably going the Section-8 route

If you don't plan to work anymore, you may want to consider the rule of 55.The distributions from the retirement account will be taxable in one way or another(now or later).You want to plan it in a way so the overall tax burden is less. 

Recent BRRR was a 2015 built single-family home with just flooring, paint, and other cosmetic rehabs so it was very.Now, we have been trying to do a BRRR in duplex to get into the MF investment, but somehow not able to land on one.

I am currently living in Missouri; I have one house rented out and am planning on getting more.

I owned and operate 2 ALFs in Arizona for last 17 years , let me know what questions you have keep mind laws are different in each state you will be under Department of Health licensing rules and City Planning Zoning rules Good luck! 

In theory yes, but it does not make sense from a tax planning point.

I currently house hack a duplex that I plan to cash out refi soon to repeat.

If your floor can handle a steam mop, I would definitely switch to one!