How to solve the following situation:

I have exactly 366 products, each with 5 categories.

Each of these categories has an information for selling it as a single item.

Are variants the right structure for?

How could it work, that selected registered customer can access the mentioned information with sending the product number and the category, without any manual interaction?

And I want to create 3 times a day an invoice about all the bought requests from the last period and send it automatically.