I was under the impression that lenders wouldn’t lend (or make it very difficult) to an LLC and/or you risked them calling the note should you transfer after the sale. 

I then re-fi'd with the same bank and transferred the deed into my personal name.

This results in careless buying, and lots of property on the market due to transfers within 3 years.  

You cannot get a conventional Fannie/Freddie loan under an LLC.You would need to get a commercial/portfolio loan or transfer it to your personal name.

Planning for unconscious states, not just transferring property at death.

You transfer or share the risk using the insurance for the expense that is HIGH in Severity and Low in Frequency(see below).

A little insight @Brandon Williams, Shorewest pulls data from the MLS's IDX feature, the most up to date data for non Realtors is Realtor.com.3&4 units tend to be in high demand for the casual investor, the debt level is not terrifying, and most owner own maybe 1 or 2 properties, as a diversification play in their retirement strategy, this makes them highly desirable, and pushes the price up.

I work full-time as a data specialist and I am currently in school to finish a real estate course to receive a real estate sales license and even a broker's license further on down the line.

Where can I get reliable data? 

How do I transfer the deed to the new owner once he buys it?