If your realtor doesn't have a sophisticated system for querying the MLS a lower-tech method is to have the agent do a full CSV dump of the MLS for SFR and send it to you after stripping out the non-public data columns. 

@Przemek Kos, I would not judge offerings on one data point.  

Ideally we trap $0 of our investment on a ~$1m ARV (ideally we get some cash out on the refi) and conservatively STR rent for >$12k/month achieving an infinite return. 

Easily achieved in the transactional real estate world  IE doing deals.. 

Who's to say "Best" but there are a lot of great places to choose from.I'd say start by looking at the data: growing population?

Set up keyword alerts to be notified of the topics that interest you: http://www.biggerpockets.com/alertsI hope BP helps you achieve your goals!

The key things to determine are what are your short and long-term goals, and then, you can come up with a strategy that will achieve those goals!

Verify all the data the appraiser used on your property and the comps.

That's achieved by taking the Gross Monthly Rent divided by the monthly loan payment of principal, interest, taxes, and insurance (as well as any dues).

One is to hire someone who can scrape that data from your county records.