All of this of course happens as I am actively pursuing purchasing additional rental properties.Shawn

It's an excellent addition to David Green's book "Long Distant REI".

If a duplex rented out for 2k per unit, would adding another unit be an additional 2k in rent, or would it dilute the property and make the rents lower. 

Please be gentle; I'm new at this and it's pretty complex :)Structure / Legal Details- we'd establish market value through a combination of comps from local real estate agent and an appraisal- attorney would establish all required "arms length" aspects including a mortgage at a minimum standard federal rate- LLC would pay us back based on a standard promissory note over 30 yrs Pros of selling to the LLC (I think)- A sale now would be the only time we'd be able to take advantage of the cap gains exclusion on this house bc we won't qualify for the "live there 3 of 5 years" rule due to the timing of our lease and our last time of residence. 

And they need a place to live for 2-6 months preferably furnished.   

As a matter fact, good deals go live everyday and sell within 48 hours.

While renting yourself, although technically not house hacking, I guess it could be considered living  for free if the cash flow from your other rentals pays for your current rent?

@Harshal Gaikwad thanks for the additional information and clarification. 

In addition, Airbnb is getting more and more competitive since the number of listing are going up and many are not getting filled as fast as in the recent past.  

In addition, they do not accept an XML file for enterprise users, but they do accept and auto/update a JSON file.