Complex website

Seeking programmer/team to develop an artwork e-commerce site (similar to [login to view URL]). Main feature of this site is to set separate website with own url ([login to view URL] or [login to view URL]) for each client that make a subscribtion. Clients can be artists that want to expose own artworks or owners of an art gallery who want to sell the paintings they possess. On the main site the artworks will displayed randomly and according to subscribtion type, as well as the artists or gallery names. Each sub site provides a front end and a backend panel, and the possibility to insert artist or gallery info, a blog, contact module, as well as a portfolio of the artworks, an easy way to sell the works trought paypal or creditcards and the possibility to post comments. This website should be a cross plattform that use social networks (in particular, facebook) to show random artworks. Each sub sites should also be connected with their own facebook fanpage, and with the possibility to click the like button for the singles artworks and for the entire site. Modifying third parties CMS's and codes is allowed, if considered appropriate. The estimated time for the design does not matter. Graphic must be professional, clean and modern. We can provide graphic support for the project.