To tap into the data, hire an appraiser and pick his/her brain about the market you wish to enter.

@Sean SThanks for the feedback and good to know the data

Yes, I use Venmo for all my new tenants, although I do have some older tenants that brought their own (Capitol One P2P, Chase QuickPay, etc).I like Venmo though because it's the fastest, and I can use their API to post the transactions to my rent-tracking app (less data entry).

I have taken quite a few courses to ensure that I understand the business and have determined that there's a lot of data required and it comes from many disparate sources which is very much like the jobs I undertook with the oil companies and banks.

I can confirm that every bit of information they provide is, in fact, legit MLS data.

As you expand your target market run the numbers on perspective properties using craigslist intel on rent rates, rent-o-meter and zillow also provide data points for rents on specific properties.  

@James StevensI currently work for a commercial contractor that installs low voltage voice, data, video and security systems.  

In fact, a number of threads here on BP served as the inspiration for me to start a property manager built on technology and data .  

There's some data to support it but the benefits are for those who have large portfolios and if you look at how most have created real wealth it's not through diversification, imo.

List source is a popular list data site.