Content Management Solution(repost)

Our client needs a solution to share documents. They are a machine distributor and service company and need to make available online manuals and answers to repetitive questions. They would like to upload PDF documents, videos, pictures and other types of files to an area where customers can access, view, read, play and download them according to permissions set by company employees uploading such files. They would also like to have an area available just for employees. If this solution is presented as a content management system, please mention other features that are part of such a system that could be useful to a company like this. Such as blog, live chat for support sessions, logging of support sessions, possible billing of support sessions, recordkeeping to track employees who engage in support sessions with customers, reports, etc. Develop and install a content management system with the main following objectives. 1.- Share documents for employees 2.- Share documents for the public 3.- Have a management module for admins and users 4.- Be available via the internet with no connection to company's internal network 5.- Allow for the upload and download of different types of files to a storage area 6.- Allow to view pictures and video files 7.- Allow for the creation and operation of different blogs covering different subjects Mention the platform to use for this system. Mention your fees to administer the system on a monthly/yearly basis if the system is hosted in house If you have or know of a hosting service please mention and include pricing.