Great guide, two things though

I notice you mention Prowlarr, I’d probably suggest it and jackett - i ran both for a while then dropped Jackett as all my matches were coming through Prowlarr and its just less admin to add sources there once and have them add to the rest of the servarr apps

Also, you might want to look at https://www.audiobookshelf.org/ - A great plex like app for streaming audiobooks specifically

This sounds amazing, definitely going to add this to my servarr setup next few days.