Interested to hear how you’re creating these data sets?

In my opinion if you are getting data from Zillow you are already too late.

Ill be testing how STR would work in the same neighborhood soon with some multifamily apartment units

I just uploaded a random PNG image file as a test, seemed to turn out OK.What's the difficulty you're having? 

Redfin is a brokerage using an IDX feed like any other brokerage using an IDX feed straight from the MLS so it's the same data.

Since you have a punch list of cities, pull this data for each city and compare.

However, as @Walt Payne said, i'd love to see more historical data on the reliability of their protection since they are a newer structure.

Would greatly appreciate any insight or experiences you have had with data mining and statistics in your ventures.

Should you be unsuccessful at your first test attempt, you'll have to wait 30 days before you can retest. 

Assuming they didn't put $100,000 into renovations, they could still see a profit with whatever I can offer.I swear I just heard on one of the BP podcast someone was saying that you need to do the spaghetti test; keep making offers and see what sticks.