Build a Website In Magento

Magento-CRM My goal is to create something similar to Priceline, but B2B and not for travel. Both sellers and buyers must have an option to create a public profile with an option to upload pics and basic info. Pricing model: is subscription only, with 3 different option, pay per link, have limited access and full access. Another important fact to keep in mind is that it would be an informational platform, where no transactions will take place. Basically, the seller would be able to display they product and buyer would pay to get an access to the name and contact info of the seller. What would be your suggestions for CRM? my next question is how long would it take you to implement this project and how much would it cost, including all the extensions that are needed for this platform. Here is the breakdown of the requirements: • Multi-vendor • Public Profiles (sellers & buyers) // Both buyers and sellers should have a profile where they can upload they basic info. • Grouping by state // upon registration clines must indicate they home state, after the registration is //complete, they should have access to products and other participants only in that //particular state. • Customer Ratings //both sellers and buyers should have an option to rate each other • Different subscription options //full access, limited access, pay per link • Messenger // similar to Facebook messenger once you connected you can instantly communicate with each other • Bidding // buyer can place a request for certain product and all sellers should be able to see it. Buyer has to put his credit card, once the request is accepted I charge a percentage based on the total of the purchase. Similar idea should apply to the seller, in order for the seller to accept the deal, he has to pay me a fee, before they get connected. • Payment: //credit cards, pay pal, bitcoin I will wait please do it asap