Hello, our UK based team would love to work with you on this project.
We have over 7 years experience developing eCommerce stores.
We can complete all the tasks you have listed within 7 days.
1) We will add a button to your homepage which when clicked opens a popup overlay within the same window containing a form to email for customers to email their images to you.
2) We would recommend you purchase said extension as it is well known within the OpenCart community as being extremely stable and reliable. We would then implement and configure it for you for your exact needs.
3) We will implement your slider as required with the popup larger images when clicked.
4) We can customise your product page as requested.
5) We will configure your SSL and fix any issues which occur when the SSL is enabled.
6) We can configure your PayPal payment pro.
7) We will set up user friendly urls for all areas of your store.
8) We can remove the add to cart and prices for related and featured products as requested.
If you have any questions please don't hesitate to contact us and we hope to work with you in the near future. Regards - Matt, Team Triforce