Is there a link to where you are getting this statistic?

Thirty days would be 8 percent vacancy in a year's time, but I don't really understand how those statistics are gathered and calculated.

That's why I posted on the forum, hoping this wasn't uncommon and I wasn't a rare statistic.

That is where really knowing your neighborhoods and markets comes into play, as well as objective data like crime statistics, census figures, housing price trends, etc.

I use sites like the bureau of labor statistics, city-data and forbes to gather information about the city and the neighborhood. 

Interesting statistic.  

It may be a bit of work but CA Association of Realtor and Bureau of Labor Statistics site offer some data that you might want to take a look at: http://www.car.org/marketdata/data/housingdata/http://www.bls.gov/help/hlpformseriesid.htmIf you can run the both data and combine them together, this might give you some clue.Good luck to you,Grove

Once you get multiple reviews you have statistical significance and can decide based on the ratio of 1 stars to 5 stars.

They should also have some good research reports on job growth, hotel statistics, sales tax receipts, housing prices, etc. 

Of which most likely neither would be a deal (statistically speaking).