Oakland County has a nice online database you can access at Oakgov.com. 

Obviously this will take time to grow but in time, more and more deeds will be publicly auditable and immutable databases.

I checked her name against the CalBre database. 

MHP moguls,Do any of you use Podio or another similar database to systematize contacts with park owners, brokers, etc?

Is there a database of properties anywhere?

But county record databases and/or MLS databases have the data you need.

This has created opportunities for technology based companies like Trulia, Zillow, Realtors, Homes etc. to merge all systems in one data base to get people to use them while selling advertisements to generate revenue.  

A unique script has to be written, for each county, to iterate through ALL of the accounts, and compiling the data in a database, which can then be queried for accounts which match your criteria.Iterating through all of the accounts requires exploiting the county's online property tax search.

But that also assumes the assessor has the right info in the database (some don't, particularly if there's been an unpermitted addition or major remodel).There are also certain searching expenses and research expenses and travel expenses that you might be able to include in basis.The legal fees for setting up an LLC are NOT included in the basis of the property. 

The appraisal database they are building was definitely a help in this case.  12 months is too long to use an old appraisal unfortunately.