Mashup of Joomla K2 extension/pinterest/youtube plugins/module/component(?) for Joomla 3

I've never requested work through this site before, so I'm not sure on the size of my project, but I'm thinking the specifications, though detailed, aren't more than a small to medium size, especially for someone who is experienced in joomla/K2/php. You can let me know what you think, if you feel this is a project you'd like to work on. Overall, I'm looking for a system design of a mesh between Joomla’s K2, pinterest and youtube that will be turned into a membership site. 1. ***Content must be built responsive in Joomla 2.5/3 and updateable, moomasonry script, and on a horizontal layout scaling, so it re-situates upon screen/resolution size and optimizes space according to target device (tablets, mobiles, etc.); similar to Pinterest. Mobile should review as 2 columns like the Pinterest app does as well. 2. *** I'd like to base content in K2, because I will be turning the site into a membership site using AEC and probably an affiliate component like Post Affiliate Pro as well >> of which both already work with K2; see site for example: [login to view URL] In other words, the end result MUST work with both AEC and affiliate program. 3. ***Users must be able to comment, like, and upload own content (including articles, pdfs, docs, zips, pics, music, videos, etc.). a. **If user doesn't load image, then an archived image (from site server) should auto load according to post/file type b. **Certain items should be able to be downloaded (permission granted by poster). c. **Experts'/gurus' (that I designate through user groups) posts will look different from others' posts. (I imagine that would be set by “if user group = guru, then background is a color of their choice except the basic color”; for example, basic users are all a light gray, but mine, as super admin, might be a teal blue--which no one else can choose; expert2 may choose pink; expert 3 may choose yellow, etc.); see site for example of varied post colors: [login to view URL] 4. ***users should be able to link to other video sources (like YouTube, Vimeo, Facebook, Amazon S3, Google, Yahoo, etc.) and auto embed simply by pasting URL; or user can upload their own videos like a video blog. a. **images should be auto captured (like in YouTube in which I can choose one of the auto captured images to be the thumbnail for the video) 5. ***Users need to be able to like/favorite/follow other users' posts/boards. a. **also to add to own boards (reminder folders) like the "repin" feature in Pinterest; Apptha has good Pinterst like system, [login to view URL] 6. ***Design should be visually appealing with base colors matching my existing color scheme (see attached file) a. **I'd like images to crop themselves to fit in the thumbnail width and possibly zoom on mouse hover, see site [login to view URL] as example. b. **I'd like post blocks to have rounded corners 7. ***Responsive speed must be very fast; my customers should not have to wait more than 3 sec for load time.