Also buying new properties could allow you to create the proper legal structure if you haven't already.

With today's market I think it's important to get creative with sourcing/structuring deals in order to make them strong investments.

Picking a house with major, costly structural issues or in a location with poor rental demand can hurt both the rental and refinance phases.

You can also structure your offer with I know at least a 2% seller credit so that you can be paid at the closing table when you're buying. 

My husband and I started out holding properties in our own name, and later developed an LLC structure (which also moved to a new structure later on).  

So if there is a way I can structure the LLC under single never but also avoid a technical “change of ownership” that is my main question!

This all comes down to how you're structured, how the flip cost were accounted for, if there is a partner (you mentioned "we").If it is an S Corporation and you "distribute" or "sell" the property to yourself, if there is any loss on value, which probably there isn't, know it most likely won't be deductible if it's a related party transaction.  

Specifically, what is your advanced payment structure and refund policy when taking bookings 6-9 months out or further...and also how do you encourage Direct Bookings?

I'm looking for suggestions on how I might fairly structure a deal and still keep the current mortgage I have, at 3%.

Google is your friend.The FEMA 50% Rule is a little-known rule that limits rehab budgets on homes in a flood zone to only 50% of the value of the STRUCTURE.