I need online photo print ordering webpage for my wordpress site

I need an addition to my photolab and studio's wordpress website where customers can register and upload their image files and select from standard print sizes and set quantity for each. It must be easy to use for all users and have thumbnails of uploaded images to give visual feedback. I'd like to have option to upload a full folder, or selecting the images to be uploaded with thumbnails.
I will translate the English wording to match my sites language. Pricing has to be based on quantity (1-5 prints cost x/print, 6-10 prints cost x/print, 11-99.....). No shipping charges for local (in city) orders. 99% of orders are picked up in person in the lab. I don't need payment options right now, I need to inform customers of total, but they'll have to pick up their orders in the lab.
All options need to be customizable by me. Print sizes 9x13cm, 10x15cm, 10x13cm, 15x20cm, 20x25cm, 20x30cm. Option for me to add a few different type of paper. Glossy finish is the standard, but I may add lustre and metallic with different prices. Image files need to be uploaded by users and need to land to my ftp into order number named folder, and email to my email address and back to user to confirm and to inform about new order and summary of order.
Please, only apply, if you can do this job. I have wasted months and got no results by fakers here, so my patience has been tested and have missed a lot of business. If, you are not sure, if you are able to do this, just leave it, please! Thanks!
I have created and translated to English some screens of a similar webpage. It is what I'd like to have as far as functions.
Image #1 welcome screen for registered user, after logging in
Image #2 upload screen where user can set default size, if he prefers to apply a certain size for example to all images
Image #3 visual confirmation of what image files have finished uploading
Image #4 preview order with thumbnails and option to change size, quantity, or to delete image
Image #5 summary of order and billing info and message option
Image #6 visual feedback and review of billing info and order with option to go back to make change, or sending the order to the printlab (order button)