With two other rentals kicking in plus day jobs we can comfortably throw 4 to 5k per month at the note, and we could even dig into savings and put a modest dent in the HELOC too.If we refi'd we would have the HELOC freed up to purchase another rental should something pop up so I do like the flexibility in that regard. 

The smaller banks are the ones who will probably be a little more flexible.

There is much flexibility but terms and profit split should be spelled out in operating agreement.

Those are generally more flexible. 

Has anyone found Credit Unions being more flexible with <$100K loans (~$60K loans) being under 4%, 30yr fixed?

I love the flexibility that it provides.

I would still like a definitive answer from someone in the business on whether there is any flexibility in the sale date and how you calculate the 24 month period.

Private owners are more flexible/generous with security deposits and lease durations unless you’re military and can get out anyway. 

(if they only require 15% down on a single family home that is usually a good sign that you are working with a flexible lender) Can I change title to my LLC?

2-4 unit properties usually have for flexible financing options as they fall under residential lending guidelines.  5 units is the smallest possible # of units for commercial.BP article with info here: https://www.biggerpockets.com/blog/single-family-small-multi-or-large-multi