Daily Newsletter Site Created able to be updated by customer

We would like to develop a new site that would be sent out as a daily newsletter. It would be updated daily and would have offers on it to bring you to links for other products. It must be fresh and friendly, organic in mission and looks, yet not all green looking. Age appropriate for 20-55 yr olds. Should model the email which is daily at [login to view URL] , with a different look and mission. In bidding, assume that you will set up similar components. The qualified person should show examples of what they have done, must have wonderful references. The site must be easy to use. The project must be finished in 4 weeks. Payment is not until the project is finished and it is proven that it works well and is easy to operate. This project may be an ongoing job for the right person. Some have recommended a wordpress site. I would like anyone who bids on this to recommend why it should be the format that they recommend.