Whichever loan that you decide to use, the interest will be tax deductible due to interest tracing rules.

Certainly one account for each LLC, (separate for security deposits based on your local rules)

I have a $2M building I bought for $935k, 3.5% down. 

I'm seeking advise from people who may have been down this road before on whether we should seeking other financing methods to go LLC to LLC or quit claim the lot back to our personal names to satisfy the 1031 exchange rules. 

This also includes any potential benefits for tax losses, no matter where they are sourced to.Given the property is in MO, it would also be subject to income tax reporting in that state, unless there are any exceptions to having a filing requirement there (I don't know MO rules off the top of my head).  

I don't want to violate any of the self-promotion rules on this thread by specifically linking or name-dropping, but it's from a data analytics platform I am working on specifically built for tracking construction, debt, and ownership activity in the Philadelphia region.I will be posting more detailed insights soon. 

There are a lot of rules to follow, but make sure you have a great custodian. 

Since you missed the 2 out of 5 rule, capital gains taxes might take a chunk of your profits, so consulting a CPA would be smart to understand how much you’d actually keep.

Long-Term Rental Rules: Even though my properties are long-term rentals, are there any tax benefits I might be missing if I occasionally rent them short-term?

Asking in the correct forum will get a better response.Read the RULES!