B2B Prototype on Drupal Commerce

I'm building a POC for a B2B website that will sync with a native iPhone app. In the initial development, i have the following requirements: 1. Install Drupal 7.2 2. Install the Commerce module and all prerequisite files 3. Install the Services module and all prerequisite files (for web services or a similar RESTful API for Drupal) 4. Install a module to restrict access to products (records) in a database based on authenticated User ID (meaning Brand A can only CRUD products in the database that belong to Brand A). I was thinking that the Premium Content module might allow for this functionality. 5. Create a web page for Retailer (Customer) to update their information (Name, Address, email, etc.) 6. Create a web page for Orders to allow a retailer and brands to view only orders to which they are related. 7. Create a web page for Products to allow brands to CRUD products. Have included some wireframes for "conceptual" design (I obviously expect more user experience than the wireframe).