Hotel daily group buying site

Hello, I am planning to launch a group buying site with travel and hotel offers and deals and I am doing a feasibility study with which platform and developer should I go with (i.e. drupal, joomla + k2 + virtumart, magento, wordpress, just PHP etc…). The site must be: - SEO friendly (IN EVERY AND EACH PART of it) - very elegant (i.e. [login to view URL]) - HTML5, CSS3, responsive design compatible - displayed in any computer, tablet computer, mobile phone (i.e. iphone, android etc…) - very fast - reliable and easily extendable/upgradeable (for example an extension could be an online booking system …) - database must be MySQL The concept is to display hotel and/or travel offers by regions and sub-regions. The user must be able to select from a dynamic list of regions (expanded in sub-regions). The list must be easily updated, in form of nice menu buttons (i.e. ajax menu). If regions or sub-regions have no deals for a period of time, relevant buttons must not be present, where as if a new or existing region/sub-region have an offer relevant buttons must appear. In every region/sub-region, the hotel offers must be categorised, according its accommodation type, in the following tabs: - Hotels - Villas - Apartments - Suites - Studios - Etc… The main page must have absolutely TWO DISPLAY options: - display the deals in 3 column-grid (matrix form) AND - display the deals one after the other (list form) After clicking on an offer the layout could be similar or better to the deal offers of [login to view URL] with the possibility to display the deal’s details in separated tabs, in the same page (i.e. [login to view URL]). MANDATORY Functionalities are the following: - Refer to friends - Buy as a gift - Coupon Generation - Multi payment gateways, PayPal, VISA, Master Card etc - Google maps - Merchant login (control panel) - Social Media integration (i.e. Facebook, Twitter etc..) - Blog Availability - For each deal a form must be filled-in by the administrator, with the details of the offer: o start-day o end-day o region, sub-region o previous price o current price o discount o number of adults o number of children o accommodation type (hotel, villa, apartments, suites, studios etc…) o piscine availability o transport availability o Room view (i.e. sea, piscine, mountain etc…) o Holidays Preference (holidays in the mountain, holidays in the sea) - Searching with all above criteria - Newsletter - Automatic sitemap generator - Xml feed for each deal, available for the affiliated networks with the following tags: o <deal_id> o <deal_title> o <deal_url> o <deal_start> o <deal_description> o <deal_price> o <deal_image> o <deal_shop> o <deal_location> o <deal_previous_price> o <deal_discount> o <deal_purchases> o <deal_type> o <deal_category> o <deal_gmaps_latitude> o <deal_gmaps_longitude> o <deal_gmaps_address> Please bear in mind that this job is only for people, with a very good experience of group buying sites, similar to [login to view URL] or [login to view URL] As a next step you will receive a more detailed requirement specification document. Thank you very much, I am waiting the soonest your proposals, time-plan, suggestions (pros and cons of your solution) and prices and of course your references (relevant sites you have already developed with demo access) Best Regards, Jean Pierre P.S. I couldn't reply to generic bids that don't explicitly feet exactly the above requirements. Thanks for understanding