Yep, this guide is a little outdated at this point, but still very solid. It does keep the file - Sonarr/Radarr actually have media management and you can clean up your media folder very nicely with them. There's containers on the unRAID app store for both that already have your VPN integrated - you basically just plug in your VPN info. Highly recommend Private Internet Access for your provider - they're the easiest one to configure and they're one of the most secure. I'm at the office right now, but there's two creators you want to look out for - hotio and linuxserver. Both of those guys make damn solid containers with this in mind.