A shopping cart integration!

Hi , We are looking for a rapid launch of a shopping cart for some designer products. I have a cloudways managed hosting and you may offer any Magento, opencart, or Prestashop solution. The ecommerce solution is already installed on my hosting but the main purpose of the project is to integrate a mobile responsive suitable theme, customize the solution, configure the setting tables in a workable standard, integrate readily available solutions for managing uploading the inventory, managing the returns, monitoring site statistics, integrating or programing a recommended system to the shopping cart, integrating payment solution and launch the shop in a rapid pace. You shall also provide a plug-in for the admin of the site to be able to import/export new objects to the product database and define attributes of each product separately. You are allowed to use any theme as long as you can transfer the copy right to us for multiple domains (less than 5 anyway). You shall also integrate most common payment solution to our server and provide enough documentation for maintenance. If you have a graphic designer in your team pls. quote for the graphic design separately too. Based on each object attributes the customer should be able to customize the order through a drop-down or predefined menu or form and add it to the shopping cart. Then, the order shall be processed through usual shopping cart mechanism. The ecommerce system should be a full shopping cart solution which includes all the usual shopping cart features such as Order processing, shipping/return/tax/inventory/promotion management, secure payment gateways, registration, reporting and emailing the orders to the customer when the payment is received and also when it is shipped, canceled or returned and so on. Only who have successfully deployed such projects before may place their quotation along with the reference of their work. Freshers, pls. do not bid! You need to submit a delivery document in addition to fully functional and tested software plus the source code. The document shall list the changes you made to the shopping cart system in addition to enough documentation to operate and administrate the system, a tutorial for our graphic designer to change the layout, theme and front end design of the website, show how the administrator can import a list of products along with their object model to the system, show how the system admin can define and change the customizable attributes of each product, and how she/he may define new categories and sub-pages. You shall also deliver full documentation for plug in integration, list of all themes or open source CS used and highlighting any necessary licensing that shall be purchased. If the proposed ecommerce solution can support 3D object, pls. highlight it in your proposal and describe briefly how you are going to implement it. While bidding please include references of similar work done and Time expected to complete the project. Also mention your preferred CMS/Cart software to complete this project. Also consider that in case you awarded the project you are not allowed to use the project in your portfolio and you are expected to help us integrate the project to our hosting solution and assist for search engine optimization. I will be providing a detailed requirement document once the developer is shortlisted. Contractor is expected to advise on how to connect the website to Instagram at the end.