Customise a Storefront WordPress site for digital products (image downloads) with three extra features:
1. ability to add custom product attributes
2. ability to make certain sections of a page (including product pages) visible to subscribers only (i.e., premium content)
3. ability to track user downloads to automatically and manually prevent bulk downloaders (users trying to abuse subscription by ripping the entire site)
1. I am already running a new (blank), functional installation of Storefront
2. Feel free to make use of existing plugins to solve the problem, with a focus on site performance (page load speeds) and cost-effectiveness.
3. In your quotation for the job, please mention the cost of plugins you wish to buy (if any) separately from your developer charges.
Link to site: I need to renew my hosting on Siteground, so the link to the site is currently down