Customization

Hi, I’m trying to do a little online portal to make site visitors sell used items. I created two types of categories: one category is represented by cities categories and the kind of object to be sold represent the second category of categories. I would ask if there are plugins that can help me.I want to allow the site visitor to post immediatly the ad about his object to sell, at the same time while registering to the portal. So that, the visitor has to click on a link on the first page (ex, directly “insert article”), select the name of his city by the list of cities, click the name of the object category (for example auto, moto,computer,ecc), write a title for the article, a little description, insert one or more photos of his object, his e-mail address, he has also to check the “I accept the agreement” check, and, clicking “ok” button, the article have to be automatically posted in the right city and right section, and he automatically immediatly receive an e-mail with included his username and password to edit or delete his article.

Finally, visitors of the site, when they surf the website and find his post and consider it interesting, they can click a small button “contact user”, and send an email to his email address using a form mail.

Is possible to make something so complex, using plugins?

Thank you very much.