Private online order form with payments

Need a private online order form (shopify or similar) listing approximately 15 products for sale. These products should include an image, a brief description, a 'regular' unit price & case price, and a 'special' discounted unit price & case price. I will provide the text and images. This will be used for a dinner event for 60 people whereby attendees should be able to order these items the night of the dinner by scanning a QR code from their phone that links to this online order page. There, they should be able to enter their information (name, email, phone number) as well as their desired order and submit. I would like an automatic confirmation be sent to them (via email or text) upon the submission of their order. The products, however, will not arrive for several weeks. I would like to be able notify everyone who placed an order once the products arrive in stock and we are ready to ship it to them. Within this notification should be a link for them to submit payment via credit card, echeck, etc. as well as their desired shipping address. I am considering the possibility of automatically adding 3% if they choose to pay by credit card. I will also need to add California Sales Tax. There will be 4 different dinner events so I would like a unique order page and QR code for each event (products will be similar, if not identical). I would like to be able to edit each of these pages and items myself as needed and be able to fully test before the event.