Hello sir/madam,
I am perfect for this project because I have been using After Effects for over 9 years, and writing scripts professionally for it for 5+ years. I have professional experience creating ae scripts for videohive, freelance clients, and youtube tutorials. I can create a script for you that follows your idea for rendering in the background, with as much footage or compositions as you have. Below you can check out some examples of my work:
Script Portfolio: [login to view URL]
Professional Script 1: [login to view URL]
Professional Script 2: [login to view URL]
If you need more script examples, I have plenty I can send to you!
Don't hesitate to send me a message if you have any questions or want to get started working!
Warm Regards,
Nate Lovell