Website Design for Gift tracking business - PLEASE READ!

We would like to have a web site DESIGNED and BUILT for a gift tracking business. The site will basically allow a user to keep track of gifts given and received. IMPORTANT!!!! We are NOT web site experts. This site needs to be built with this in mind. We MUST be able easily add advertisers, change things around, etc. without having to hire anyone. In other words, the back-end features of this web site must be very easy for non-experts to use). Please refer to a web site [login to view URL], my site would be similar, but offer different features.