What is the easiest way to "scrub" the data.

http://www.city-data.com/ shows most of the data you are looking for.

So I downloaded the data and got to work!

PLEASE LET ME KNOW OF ANY SITES OR ANYTHING I CAN USE TO RESEARCH AND LEARN LOCAL STATISTICS AND DATA THANKS!

When this happens you kinda feel the end is near without even looking at the data... 

., all cash, no contingencies, closing before the scheduled data)? 

This is understandable as the site began as ForeclosureRadar before morphing into its present service.Since neither Riverside or any other county is a great data provider, it's up to you to decide if you really want to make money or if your just playing with the idea of making money.

Ask them for the analysis and data they used to get there.

Then call the restaurants to see if they're open year round.Are there other data sources available?

I am not for or against the idea itself, but reasons 1-5 are vague theories, no data, no references to where a land tax was tried and this is what the result is.