Build a website app or Mobile app (We count with server and domain already)

I need you to design and build a website for my small business. A university start up in London, we came up with the business idea to create a platform that connects sports enthusiasts in a wide range of sports. Looking for an MVP, this platform should be developed as a website app initially or a mobile app. The location-based platform offers a matching service where users can match according to location as well as a few preferences, including skill level, age and gender. Further, it offers an event service where users can create and joint events such as a 5-a-side football game. The events page will offer similar features to facebook's events page (incl. visibility options, postings, etc.). One difference, however, would be that we want to include the option to restrict events to a certain number of users (e.g. 4/10 available). A third service offers users to find nearby sports venues. One point to mention here is that we hope to be able to use existing data bases of maps with venues as they are available online (this is one of the websites: [login to view URL]). Lastly, there is a chat option where users can chat with other users that are either in their friend list or that they have had match with (within the matching service). Users also can search all other users within the app through a search field in the chat tab. Users should be able to register via Facebook and email. The service is free. The website app or mobile needs to be built by march 4th.