ecommerce mobile application

I want to build a mobile application. (I DO NOT HAVE ANY E-COMMERCE WEBSITE AS OF NOW to link this app) Basically this will be a mobile application where thousands of retailers/store owners can come and create their mini stores and display their products (This is the admin user interface). For a consumer/public, app will display all the stores and the users can choose and mark favorite, any of the stores they want. Users will also be able to search the stores based on filters like, TYPE, LOCATION etc. Users can check out all products, zoom in for product details etc, place in their wish list, place orders and once the order is placed, an sms goes to the retailer about the order. Retailer can choose to accept/decline the order and accordingly an sms goes to the user. Payment and Delivery solutions are not required as of now, will be added later. Users can also chat with the retailers. Basically both users and retailer will have a separate login/dashboard etc and this chat will be 'within-application' chat only. Retailer will have the option of putting as many products as he wants, product pictures, description, his store information, contact details, changing themes, etc etc. There will be a 7 day free trial for the retailers and thereafter they will be required to pay of they want to use the app. For users, it will be always free to use. Whatever information the retailer will upload will go to the MAIN ADMIN of the mobile app and once he approves, it will go live. Features to be added later: 1. Payment Solutions 2. Geo Tagging of stores – Users will get the nearby stores on top