B2B & B2C Bigcommerce Marketplace Project

Need two Marketplace Websites in BigCommerce. One B2C & another B2B. The site would have two tabs where one is B2B & another is B2C. Two different databases. B2C Features: Vendors can come and list their products for sale. Customers can come and purchase those products by creating an account on the site. Vendors can provide discount percentage and discount coupons for products which they are isitng. Vendors must have all details of sales happening along with customers information in their dashboard and backened. Vendors can edit prices and add as many products as they want. B2B Features: B2B is purely vendor to vendor transaction. All Vendors can see the pricing of products in bulk. That means, if I am a vendor I can see the products listed by other vendors but pricing would be in bulk, that means I can see how much cost for 100 products, 200 Products. Hope that makes sense. Admin Features: Admin can also sell their products by uploading it to the site. All Sales happening both in B2C & B2B would come to the admin by the payment gateway which would be integrated on the site such as PayPal, Stripe etc. Admin would access to the entire site CMS & all sales, all vendor details, all customers details etc. Other works: Integration of DHL, UPS & some other Shipping company API integration. The Design of the website must be nice and glamorous and need good creativity. Site should be mobile Responsive. Need to see home page design first before awarding the project. DO NOT CONVINCE ME TO HAVE IT IN WORDPRESS OR MAGENTO. I NEED IN BIGCOMMERCE ONLY.