Adding Client Login Area To Wordpress Website

Hi, We have a project, which requires adding a 'client area' to an existing clients Wordpress website. Which will allow users to login and view existing 'jobs' and 'projects' and also add new ones. - Each job that is created needs to have an auto job number and the unique client ID recorded, then allow the them add a 'Title' and a given level of 'security' specified (high, medium & low). - Each product, will need to be categories into these specified 'levels', and filter according to each job. EXAMPLE: High level of security jobs will highlight other products in that category, as well as other relevant Med and Low Cat Products to complement the selection (as per shopping sites that states: "people who bought this product as so looked at these"). - Registration form will need these fields: Name, Company, Email, Telephone number and a Regional area drop down which will assign them a sales agent (and contact details for them) in their area. Please IM with any questions or queries, right now we are looking for an estimate then we will provide a more clear brief and flow chart before any work is commenced. Thanks.