GoStock / PHP Laravel & Webdesign

We want to setup an E-Book-Club. The functionality is similar to Shutterstock. The user can preview (thumbnail) and download PDF-Documents (maybe JPG etc.) and sign up for a monthly Membership. We found GoStock (from Miguel_Vasquez) as a good Basic-Script, but it has to be enhanced for PDF Documents and monthly membership. We need most of the GoStock Features like MultiLanguage, Tagging, Statistics, Comments, Rating etc. All you can imagine for an E-Book Club. Payment using Paypal and Stripe. The Website has to be User-Friendly and easy to maintain. Thank you! Please include "Pinguino Book Club" in your application.