Classifieds Ads Web Site

I need a PHP programmer to create a classifieds ads web site where: 1. users to be able to add their ads with or without to register 1st, 2. to have featured ads for each category/subcategory which to be displayed on both category/subcategory page but also on front page 3. banners and Google adsense to be able to be implemented 4. users to be able to add pictures and videos for their ads 5. i want to be able to change the fonts, slide shows, banners by myself 6. the site to be SEO friendly 7. i want to be bale to add categories/subcategories easily 8. i will provide to whom interested, examples of web sites i like 9. i want to continue the collaboration with specific programmer for future upgrades/updates of the site 10. i will pay at the end of completion of the site 11. more detailed information i will provide to whom interested