develop a dashboard and a website for B2B where people can buy and sell

We are planning to create a website with the following specification : It is a B2B network to connect a group of sellers and buyers to share their products and needs. Users should be able to create accounts and specify their area of services and products to their profile. They can create a business network of their partners. The website also provide chatting and messaging services. The buyer posts a quote and the registered seller can respond to the list of requests.