This web site is full of all the information you will need to learn.

The newest census records are from 1940 (only allowed to publish 70 year old data).Search for the person and if you find them in the census, you'll also be able to find siblings, who you then can search for.They have old address books, so you can look them up and see, if someone else with the same last name lived at that address.

@Chris CapersI highly suggest you take a step back from trying to entirely self-educate on the web. 

Some cities publish their code violation reports and those can be a source for vacant homes as well.

The Denver Post often publishes data about the housing market.

it's usually published in a city newspaper,, google it for your area. what's acceptable in my buildings is 98%... no reason your not filled up unless you have poor planning and poor maintenance prep for turns..  

I can view all of the scans on their web portal under our account login. 

I suspect in less than an hour of online research and a few phone calls you'll find out where they are held.A really easy way to find them is to pick up all your local newspapers, because the "Notice of Trustee Sale" will often be published in the local paper with an address and time.

The first thing I do when I come to BP is to review my alerts.Not related to the app, but I hate that I don't have the ability to give a thumbs up when opening the web browser of BP on any browsers on my ipad.  

(Examples show stain vs. priming, I just picked random links from the web.)Looking at 350 - 400k which is considered near the "higher-end" for Western Massachusetts.