Develop Two Sister Websites & A Structure for a network of Mini Sites

Key Features of the Project: 1. Develop two sister websites with similar (related to alcohol, drugs and other addictions) but sill with distinct focus; one more academic in nature for professionals and the other informational for general public. 2. Both sites will need separate logos, headers, etc but will share same back end C-Panel features for adding/editing content. 3. Both sites will be EVENTUALLY quite detailed and deep...so CMS needs to be able to support such expansion in future. Archiving of data and site navigation should be simple, intuitive and very user friendly. 4. Both sites will need Internet based CMS to add/edit written content including images and video/audio clips....such as lectures, seminars, etc. 5. Both sites will need space accommodation and CMS support for listings, display/banner ads, etc... These listings/ads should be easy to add/delete/modify through c-panel. 6. Both sites will need automatic as well as manual/custom news feeds, blog sections, etc. 7. At the start each site will have 6-7 sections such as: Articles, Disorders, Resources, Treatment Options, Treatment Facilities, Disclaimer, Contact/About Us, etc. The C-Panel should have feature to create/edit these main section headings/names. 8. Will also need a simple template for additional specific content based "mini" websites (8-10 pages each) on related topics such as: [login to view URL], [login to view URL], etc...the purpose is to cross link these with main sites for network and SEO purposes. Any more questions for now? Please ask in detail as I'm not a technical person so that there is no misunderstanding down the road.....