Build A Webpage for Custom Orders

We are a full service printing company that offers screen printing, outdoor graphics, full color printing and Graphic Design. With that being said, we offer a lot of various product types with multiple options for each product. We currently have a website through Wix, but do not think Wix has the capabilities needed for what we want. We were thinking we would just link the new "website" or subdomain to the website and allow people to order that way... or whatever option makes the most sense. Below is an idea of what we are looking to have on the webpage. Base Products - Limit products and sizes to our most used for initial checkout, and have another page that takes them to more custom products and sizes. Upselling after picking initial products - During checkout, have a page that asks them if they want to add any other products to their order… Show 3-5 most popular/closely related products and then an option to keep shopping Price depends on quantity - need to incorporate price drops for various quantities Bundle & Save - One price for bundles of 3, 5, 10 products.. List the bundle price and the price they would pay without the bundle. Have various combinations customers can choose from. (ex. - 10 shirts, 500 business cards, 5 yard signs, etc..) and they can choose different bundles based on how many different products they want. Can also have add ons for higher amounts of any given product type that will be determined by quantity, and still applying the bundle discount.. (10-15% off regular price) Artwork Upload - Need option to upload artwork and then submit artwork back after editing, and for confirmation Product Preview? - Allow customers to see the product they are considering with their uploaded artwork, or without