Create service provider online directory

I have an existing site, [login to view URL] that is inefficient. I want to redesign the site completely and have hosted on a cpanel server. The site must have: 1. database that can be accessed by an administration panel for editing and creating new listings. 2. user portal to add their company as a free listing 3. user portal to add their company as a paid listing with top level placement 4. seo friendly for relevant keywords 5. visitors can search for a service provider by zip code directly from the main page 6. search results based upon distance of zip code, with selection for visitor to change search radius. example, 5 miles, 10 miles, 20 miles 7. results page that will have adsense ads and banners that administrator can add Here are a few examples of what I am looking to accomplish: [login to view URL] this site has links for testimonials, FAQ's, resources, etc. (I want similar features on the new site) [login to view URL] exceptional site, excellent design, great SEO - comes up for hundreds of thousands of keywords. I need a freelancer that will be committed to complete this project in a reasonable time. You must also be able to work on an on-going basis for site support, upgrades, changes after site is completed.