Use a designer experienced with short term rentals. 

Locally getting some of the public record data is impossible to get anywhere outside of the MLS.  

We pay close attention to the market and review market data through Zillow and Craigslist regularly, as in at least four times each year we put together spreadsheets on the competition on a square foot basis. 

We have a Carrot website which is designed to generate traffic to your page and has spots for leads to input their info.

@Tom ShallcrossSince this mentions “design” could this be for new builds and not cover existing housing?

@Jay Wang if you look at most of my previous posts about Raleigh/Durham they are data-driven answers, however, in this case, I think a common phrase I hear around town best answers your question about Raleigh vs Austin."

What are the best sources to receive local real estate data I.e( market inventory, average days, median sale price, etc)?

Anyone can wholesale as you know, but what makes a good wholesaler in my opinion is the quality of the numbers and data they supply. 

Or are they allowed to heloc guides mimic Fannie.Freddie which are by design residential in nature.

AirDNA is a great data resource but you must also peel the onion.