Add new features to an Online Store (Django-Oscar)

Background: We're in the process of establishing (Website-x) a new multi e-store website that enable users to set-up their own e-stores and sell their products. Buyers will have the ability to search for products of all of the e-stores in a single web-page, as well as searching individual e-stores. In summery, (Website-x ) will provide the complete infrastructure for buyers and sellers to trade their products. Current status: The website has been built using Django-Oscar (Open Source library) which meets most of (Website-x) requirements. However, Django-oscar is designed for single e-store. in other words, it provides most of the functionalities needed for buyers (catalogs, shopping-cart, product reviews ...etc), but users cannot sign-up and add and sell their products. Project requirements (This request): 1- Provide the ability for users to sign-up and create their own e-stores. i.e. users add/manage/sell their products. 2- Create and interactive user friendly webpage for users to mange their e-stores. the webpage must be built using bootstraps. 3- Provide the functionality of e-store reviews. i.e users rate an e-store after they purchase a product. (Products review feature is already available in Django-Oscar). All of the above should be done by creating new Django Apps that extends the core Django-Oscar library. The core library should not be modified.