Yes, sometimes it might help to have multiple providers on different backbones if you run into availability issues.
There are currently no legal cases in Germany against Usenet like with copyrighted material and torrenting, that’s mostly because you don’t distribute with Usenet.
scenenzbs is great, also has many files with English+German audio, marked as DL or dual language.
Depending on power prices in your country I would take that into strong consideration, while some server or desktop grade hardware might be technically very good, they often have high idle power consumption without offering greater functionality.
Take a look at this German Forum Post: https://www.hardwareluxx.de/community/threads/die-sparsamsten-systeme-30w-idle.1007101
They also have this google sheet: https://goo.gl/z8nt3A
Because it’s easy and free, GitHub has great static page hosting