Convert 11-Hour YouTube Video to MP3

I have a publicly-available YouTube video that runs for roughly eleven hours and I would like the entire soundtrack turned into a single, high-quality MP3 for my own personal listening. The link is ready to share as soon as we start... (Budget: $10 - $30 USD, Jobs: Audio Editing, Audio Engineering, Audio Mastering, Audio Processing, Video Editing, Video Production, Video Services, YouTube)