Inter business rating scheme

We need a nice looking website for an inter business rating scheme. This means that businesses sign up with us and they in turn can rate other businesses they have used and deal with. The signup process will allow them to give themselves a username and password, which will then link in to their admin area where they can add info about themselves and their business. It will give them a whole page of details on the site and list their ratings when other businesses search by type or name or location. Businesses have to register to be able to rate or search for other businesses. There must be a master login area whereby the site admin can administer all the businesses and view their ratings etc. More info will follow once a suitable candidate has been selected. That's basically it.