Web design, logo, web development, and intergration of a searchable database

We looking for a developer to produce for us a flexible platform which would perform in a similar way to www.findababysitter.com, which will be an introduction site, to introduce customers to specialists who will provide full time or part time support around the house, with various activities such as cooking, cleaing, homehelp etc. The site should provide a flexible platform where specialists can enter their data into a form and also attach photos, CV's references, qualification details to their profile, and customers can, via a seperate form fill in their details and requirements, the system should then match the customers to the specialists with the relevant skill sets, and in the correct area and price range. As some customers will be mature we will need the site to be compliant with web designs for the elderly. It has been suggested that to develop a bespoke fully functioning phase 1 site would take 20 days. We expect to add addtional functionality as phase 2. We dont have to go for a bespoke site and are open to suggestions as platfoms may already exist which a developer could utiise, we do however need the structure to contain CMS and be flexible to add in extra functionality and data verification etc.