If not, maybe reach out to a few local lenders and get concrete data based on your current financial situation. 

I have tested a few methods for finding myself leads- Google Ads, Direct Mail campaigns, Bandit Signs, Driving Around, Craigslist/Marketplace, Zillow, Facebook Ads, Instagram Ads, Buying lists, etc.

Hey fellow_____We've been testing a new pricing strategy to start off 2020 and so far we've seen some pretty interesting results - Over $50,000 in bookings in just the first 13 days to start off the year from all booking websites (Airbnb, Booking.com, etc.)

Paying for licensing courses, state tests, MLS dues, and a variety of other fees can add up, especially the yearly or bi-yearly renewal fees for licenses, Realtor associations, MLS fees, and various admin fees .

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.