Mapping by demographics

[knox gsl]

I'm trying to find out some info on demographic maps and how to best market myself to my target customer. I'm wanting to know how to get custom made wall maps that include demographics based on home worth, and household income. I've found some info on the USPS.com website but I'm not ready to drop $500+ on a wall map. I'm hoping someone who has done this type of marketing has some info to share. My overall goal here is to tighten up my service area and to get customers who want a full service lawn company not the lowest bidder. I would also like to have a compainion version of it for my computer that will also have accurate house numbers to help with extremely direct marketing, to the point I can mail personal letters to customers that would be ideal to my business.