Assuming you are talking about lending your own money to local flippers (i.e. not hypothecating or syndicating a mortgage pool), we’ve been doing exactly what you want to get into and published our process in detail here a few times.

Have you searched through the MA Housing Court web site for answers?

There was guidance published in the “HUD Guidance Memo on Landlords’ Use of Arrest and Conviction Records.”

Maybe BiggerPockets would publish it...what do you say @Mindy Jensen? 

There are a lot of great options out there; aside from providing the basics (ie. listing tool to get the property published to 10+ major sites, scheduling tool to schedule viewings, tenant screening with comprehensive applications which include nationwide criminal background checks + credit checks + eviction history, digital lease creation tool, rent collection tool, and maintenance tracking tool), some services also offer your tenants additional capabilities which makes it an easier sell on your end when getting them to transition over (ie. their ability to report on-time rent payments to the credit bureaus; this can create an added incentive for making sure they pay that rent on time).

You have to connect with me to get the phone or web address since this forum blocks that stuff. 

My experience with the published rental rates are decent...mainly because the rates are based on data that is entered right on Zillow by landlords that are trying to rent their units....very common place to advertise units for rent, so the landlord puts up the ad and the rent..... the info isn't being pulled from 20 different sources and estimated.But the best way to check rental rates is to visit all the sites you would visit if you were looking for a unit....pretend your are looking for a place to rent and start pulling up the rates for available units in the area.

But to answer your question I think your idea is a little late to the game unless you have some heavy-hitting angel investors who can push you past Zillow and the other top dogs and wait about 10 years for their return :) I'm studying to become an agent, but I am also a web developer that is building an online community for my hometown (like Parkbench, but much better). 

Invoices are accessible to review via the owners web portal at any time. 

It's better to go directly to the government's web site to do the search, because there are a lot of fake "search all public records" sites that will always tell you that they found 387 entries, and then try to charge you to see the results.If you do this, it's also on you to make sure you find the right records - a lot of the public search sites will only let you search by name or address, and not SSN.