custom PHP moving to Drupal electronic ecommerce

This project is for moving this live PHP website to the Drupal CMS: [login to view URL] This website needs high security so hacker do not access the datas and files to download, also make sure a hacker do do brake website. This is a database structure in PHP for a simple ecommerce using only Stripe payment (already configured and well working). No shopping cart is needed, only a direct buy now button, same as actual. The admin in Drupal must have same functionalities as actual admin section, can manage products (add, modify, delete), can track completed sales (date, name of buyer, email, name of file, etc). Look at actual admin section to see what is needed. The electronic download files sent after a purchase is done has a unique url created by the database, we need to keep same exact working (this assure that a product download link is not used many time by different persons). The website must be responsive, you can use a drupal template of your choice that fits the original website. you can access the actual admin here (this is a copy with only example datas): [login to view URL] Username: erp_789 Password: hfgh56sw33 Please send me a quotation and delay of production, including all tests and delivery on my server.