Creating a Database of Homes

[Matthew McMenamin]

I'm wondering if anyone has experience building out a database of existing homes that shows ownership information and property level characteristics. 

I have a non-traditional lead source that will only be providing me with names and addresses. I need a database to throw these leads up against. First, to check if the name I have matches the owner name on record. Second, to check if the property characteristics meet my criteria (beds, baths, sq ft, etc.). This database should ideally update every once in a while to ensure accurate data. 

Somebody recommended I start exporting homes from an MLS login in chunks of 5,000 (or whatever is allowed). I was told the MLS won't export ownership information from a local realtor. ATTOM data charges 1,000's of dollars for this type of thing. My best bet right now is exporting from Propstream. This is for Hamilton, Boone, and Marion County in Indiana.