"Fixed rate debt or floating rate, what is your preference?"

I always tell my clients to put a reminder on their phone to go off monthly to ensure they pay off all debts like this that can cause them to have higher credit scores. 

You will be able to take advantage of it in a SDIRA if the syndication also has taken on debt and therefore passes UDFI on to your account. 

It really comes down to your comfort level with debt and your long-term strategy.

As you pay off the debt are you comfortable with $4M equity exposure within a single LLC?

As a generic advice:  I would recommend paying off any credit card debt, or high loans. 

If she moves out in seven days and leaves the house undamaged, you can apply her deposit to the unpaid rent and forgive the rest.

I would use money from a HELOC that I have open to fund the down payment, but as @Scott Trench stated recently on the podcast, that is a short term solution, and I don't want to hold that $48k debt for more than a few months. 

I think paying off a loan with a high interest rate debt and adding to the principal is one way to stay liquid within the property. 

If you don't have a good foundation(bad debt paid off, $$ saved up) I would first focus on that.