Webdesign for freelance

The company is seeking to launch an online shopping website primarily to sell licensed electronic media content to include Audio-music, Video-music and movies and Art works. This website should be comprehensively designed and developed to prevent piracy utilizing encryption to forestall duplications after payment and download of contest file unto buyers Laptop. The website will allow visitors to preview-listen or watch brief selected content before payment, while also capturing buyer personal and accounting details in a designated database. The media content being offered will be stored on a fast access centralized server to be updated locally from our local office. Ability to paste website buttons on other related sites should be made possible, as marketing is essential for success of the business. For housekeeping functions we need frequent clients, content and accounting maintenance. Developer must visit other related sites such as Yahoo Music, Yahoo Movies etc. for ideas of functionality to incorporate. The most critical also need (as an option) ongoing website maintenance to keep site very current and for increased daily hits. Kindly direct to an existing website designed by you depicting similar function applicable. After completion of website design and testing, what other related services are offered or included in your fees? Thank you.