The aforementioned sites for the general public do not have real-time "closed" transactions.

With my background of being a public accountant, this part is a whole lot easier than it is for most people.

Looking for as many publicly available (free) real estate data sets as I can get my hands on.

I just want to know what database I’m searching for; what government website, is it public, etc.

I have a marketing agency, and we sometimes have clients post content on their own website first, and then push it out to other magazines and publications.

Based on the scenario you provided the interest is not deductible. https://www.irs.gov/publications/p936/ar02.html#en_US_2015_publink1000229900In order for a home mortgage interest you need to have the following:1) The interest must be based on a mortgage you took to buy, build, or improve your home and less than $1M (check)2) The mortgage debt must be secured on a home (check)3) The secured debt must be on a qualified home Since your home is now a rental, this disqualifies you from taking the home mortgage interest deduction.

This will erode equity and there is no easy way to know without discussing with the borrower since the deferred principal is agreed in a loan mod agreement which is typically not recorded for public review.

@Matt SterlingHonest question for you, and you don't have to answer it publicly, but it's more of something for you to think about.Apparently the seller is clearly ok with this sex offender renting here. 

@Jesse BellavanceThere are a million good sources for data, and it's definitely a personal hobby of mine to run different kinds of analysis on less than normal data sources.One that I have liked recently is: https://k12.niche.com/Sadly they do not have a publicly available API, but you could still crunch small data sets or use a scraper to gather school district info based on zip codes.Charlottesville is a great area.

Sales info is generally public or can be obtained from a Realtor or website.  6-7-8-9-10 times rent and now they are trading at 15 so maybe the market is overpriced or maybe knowing market players are anticipating strong rent growth.