Sounds like you are a data hoarder haha. Can’t blame you. But for such hobby’s perhaps a ZFS system with deduplication and a second ZFS system to use for backup of the first system is what you want.

Does get costly though.

Can someone give me a tldr about why the hate towards Pewdiepie? I have not followed him in absolute years.

Oké grandpa, its time to take your meds

The tux logo at boot is due to a kernel option. You can enable this if you like.

Well yes but if you are migrating almost anything to Linux. this might be worth while over expensive windows infrastructure.

For such a setup I think it Is a good idea to look in to freeipa/idm. Would make management a load more easy. centralized account control and being able to sit at any PC and login with your own credentials is one of the many benefits.