Trading-card-grading service, form help

Site URL: https://www.mgpokemon.com/

Hello! Looking for advice.

Site offers a “grading” service, buyer clicks “add to cart” and a form comes up with a few questions they have to answer by filling out text inputs. 
 

each service added to cart has to have individual details. I found out if they just “add to cart” and fill out info, search service instance stacks in the shopping cart accordingly and keeps the responses.
 

For that to work properly there cannot be a quantity input - I found out that can be hidden with custom CSS, and it won’t affect the checkout.
 

My question is, is there a better way to do this? I could code an app snippet that collects the info as I need it, then send it to a database or email but I don’t want to fragment like that. Is there maybe an extension that allows for that behavior?