Site Similar to www.livingsocial.com [Low cost]

We are planning for a deal a day website almost similar to [login to view URL] with some differences. Please give a look to [login to view URL] and let me know what do you think about it. It would be great if you can also provide an estimate on the time involved and the cost of developing this product. The following are the constraints to consider before planning: 1. We don't want to maintain our own web server [Optional/ Have a VPS you can use that and deploy there] 2. We want to be able manage everything on that website(you can easily figure out the manageable components after exploring the [login to view URL]). Let me know of there are grey areas.[Admin panel should be very efficient with WYSWIG editors etc] 3. We want to use some third party payment gateway .[Paypal for sure , also for credit card payment , plus need some panel incase the payment is in person or home pickup] 4. We don't want to spend any money on any proprietary software. 5. We don't want to store any critical piece of information such as credit card information with us, all such data should be stored using some third party secure service. For instance we can make use of some payment gateways service to store the sensitive data at their end. This is required to ensure that we don't run into any security related issues later on. But we do want to save customer's basic information like name, Email etc. with us. Also we need the ability to charge customer at any time and cancel any transaction. 6. Also the site should be very design friendly like template based eg : wordpress , I dont want my development team to spend hours to integrate new design . It should be same as in case of wordpress . 7. The site should not be for one buyer , we will be selling the facility to many people so that they can have there own livingsocial website for a small montly/yearly payment .Ideally it will be like wordpress only but not free , someone clicks be a partner and he gets his own application, he should have facility to add new templates like again wordpress does also white label to him own domain from [login to view URL] . 8. Signup for users will be from facebook, twitter , gtlak etc , you may use RPX or theres another JQUERY based signup which also is easy to integrate .This is a half day job I can help you with quick solutions so dont consider its a hude thing to do . Please let me know if you have any questions or would like to know anything more about it. if required we can chat or talk as well, see my portfolio for more contact details . Based on your quote and estimate, we'll be able to plan the feasibility of outsourcing this product to you. Remember the QUOTE should cover every aspect , all certificates , development , testing . Please consider all factors before bidding .