DNN or Joomla Solution

Looking for someone that can develop a Dot Net Nuke or Joomla system that allows the following: The CMS will serve as the foundation for a website that allows my customers to create their own webpage/site. There will be a free webpage (one template) and a paid version (several templates). The user must be able to EASILY add content without html knowledge. ** Only one template will need to be developed. ** CMS Features Based on type of User (Level 1, Level 2 or Admin) Level 1 User logins and can view and edit only ONE webpage template. The template is a custom, pre-defined template that allows the user to create ONE webpage. The user does not need to know any html The user can upload pictures, enter text and links. The user can preview and when finished publish Level 2 User logins and can view and edit multiple webpage templates. The templates are custom, pre-defined templates that accept a certain html type based on location in the template. The user does not need to know any html The user can upload pictures, enter text and links. The user can upload video, etc. The user can preview and when finished publish Admin controls access for all users. Needs to be simple enough for a middle school student (11 - 15 to use)