Small Business Sponsorship marketplace - repost

Avg Bid (USD)
Project Budget (USD)
$250 - $750

Project Description:
I need a FREE sponsorship marketplace dedicated to small companies and small sponsorships.
We start in English but we need to prepare it as to be multilingual.
Most important thing three adsense banners in every page and very easy interface and great usability of site

Structure is similar to

You can be a
1) an organization or an event or a sport team etc etc looking for a sponsor
2) sponsor, that is a company looking for an event to sponsor

- If you are an organization looking for a sponsor: you can sign up (where you read terms and legal notice) and after signup you can login, you can write your ad in a structured listings according to subject or category, if physical or online, telling what is about, where is located, writing tags, how much money do you need, if you can accept multiple sponsors, and you can upload some (small) photos or links. Your e-mail is hidden to avoid spam but interested visitors can contact you through a form. Your ad is verified by a confirmation link and published after accepted by moderators. After first contact, people can discuss together.

- If you are a sponsor: you can browse listings, but to have contact details you need to signup (where you read terms and legal notice) and login. You can also search ads in a search engine by tags or keywords. You can search by location too: you write city\states|country and search engine will display the nearest (google maps)
Sponsors if logged can also launch reverse auctions: they set their budget and some tags or country location as preferred bids. Then organizations can make a bid. After 1,3,7,10 days, bidding ends and sponsors can choose.

Everything is free but everybody should be forced for everything to go online, visit site and see pages with banners. Every mail should ask for going online.

Skills required:
CMS, Joomla, PHP, Website Design, Wordpress
About the employer:
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