He does also have a website with programs you can purchase.

update - the Jefferson County Tax Assessors website is down. 

I really want a duplex, but most of them are far from where I work (40 minutes away) and the numbers just don’t add up when I run the reports from this website.

@Jordan Gilberti This is one of the toughest areas of this industry to accurately capture...especially flippers taxed as ordinary income...and at the end of the year, how many investors really do a deep dive on their properties and confirm actual ROI...not many...this is tedious (and sometimes disappointing work).While flipping houses is not a viable or sustainable industry, it works for generating vacation cash...the most successful flippers aren't flipping houses any more, they are lending or teaching other people how to flip houses...but why?

You should be able to get better information on crime areas on the city-data website.

You can always find city-specific code info on their website or by calling the city!

Google and other sites have keyword generators or suggestions, but I just can't find what I feel I'm missing. 

@Matthew Logan Parnell  You can check this website for down payment assistance program   www.gadream.com. 

You can check if the property has any history of testing at this website/database. https://eohhs.ehs.state.ma.us/leadsafehomes/default.aspx

Hi, What are some recommended websites or tools to be tracking housing market trends, in order to determine when a good time to buy will be.