The small local guys usually have good data but it tends to be a bit more work to use as they can't afford to build the same quality of software.

The data is from 2012, but the reasons for migration have not changed.  

However if  you look to data to support your bubble or no bubble I believe it is largely fundamental driven not IRRATIONAL EXHUBERANCE.

I'd not look for bank info until you are sure who the owner is.If you want to send me the address, I'll look it up and see what my data says.  

I will be very pleasantly surprised if this works out. just adding another data point for people's consideration!

Can you suggest where I can find data and what data I should be looking for?

@Rhett Tullis is right about rentals - there isn't much data there.

You have to take proforma data from agent and adjust it to your expenses and rents to see if it makes sense for you.hope this helps.

An anonymous whistleblower is alleging that Zillow steals listing data from agent websites in order to compare it to data scraped from realtor.com and see where its own site is falling short.In a letter to attorneys for realtor.com operator Move Inc., a presumed Zillow employee claims knowledge of illegal actions at Zillow and points Move to specific people, documents, keywords and locations to search for evidence of those actions.The allegations support Move’s claims of misappropriation of trade secrets in a lawsuit filed a year ago against Zillow and one of its execs, Errol Samuelson, a former Move employee.

Another reason for getting the data:  As an investor I would need data to support paying a premium for a property.