Commercial Real Estate Finder

I need to locate commercial real estate in Washington state, USA that meets very specific criteria. This is a very difficult problem. The real estate needs to be zoned commercial, industrial, or agricultural. It must also not be located within 1,000 feet of the following type of establishments: "Elementary or secondary school, playground, recreation center or facility, child care center, public park, public transit center, or library, or any game arcade admission to which is not restricted to persons aged twenty-one years or older." Commercial real estate listings can be found on websites such as loopnet.com. Your job will be the following: 1. Identify the appropriately zoned listings on [login to view URL] as well as other sites. 2. Use the Google Maps API to determine if the listings are located within 1,000 feet of any restricted establishments. 3. Generate a final list of commercial real estate listings that meet all of the criteria. The difficult part of this problem is locating the data sources to feed into the application. If you are bidding on this project, please write to me some specific examples of the data sources you will use.