Finish The Backend and Front End of E-Commerce Laravel Website

I have like 40% Finished E-Commerce Website in Laravel, and I want to finish it. Before You read. I have a strict Budget of 400. DON'T EVEN BOTHER BID IF YOU ARE GOING TO GO ABOVE 400. The Following are the requirments: • First, Feel free to dry the code more because I don’t like the way it is written • Second, feel free to edit what you want or change what you want. • Plug in the new graphic design of the website. • Use Pascal Convention for Variables, Classes, ID, etc. o Example: Class: <div class= “MainTitles”> o Example: Variable: var ProductCounter = ….. o Example: ID: #ProductTitle • Add Address of the Buyer in the registration of Buyer o Use this address in check out process o Or, let the buyer add their specific address • Add a step for adding address for guest, (Non Registered), buyers before check outs • Finish the Owner Area where the owner can: o CRUD Admins o CRUD Buyers o CRUD Categories o CRUD Sub-Categories o CRUD Products • Remove Download/View Receipt. It should be available only after the buyer has successfully paid. • Finish the design for the new receipt as designed in the graphic design files. • Let the buyer be able to leave a review for the product right after it has been purchased • Show the reviews of each product right next to them • If the products fall below a quantity of 10, have an alert icons with notifications in the admin dashboard so that it says what product have fallen below the quantity of 10. • After Successful Purchase, Laravel send an email with PDF attachment of the receipt for the buyer • Do Front End and Back End (if Back End does not exist) form Validation for all forms in the HTML • How are you going to handle multiple purchases at the same time? Like if you have 11 buyers and 10 pieces of a product, how are you going to protect the backend/front end from over selling by 1 product? Very Important Question