The possibility to give your customers to create their own PDF catalog on the go - with a limited possible choices - does seem interesting indeed!
However, it could be very dangerous.... a competitor could 'play' with this option by creating X PDF catalogs on your store, leading to an overload of your server and finally crashing it... bye bye store!
On the other hand, our PDF Catalog Module allows you to create catalogs everyday or every week if need be using a CRON task, providing your visitors with a download link available on your store.