Router: opnsense/pfsense
Switch: I guess look at something like Open vSwitch After some more reading I would go for a proprietary managed switch here. WiFi/Mesh network: OpenWrt with 802.11r setup - https://openwrt.org/docs/guide-user/network/wifi/roaming
Server: Proxmox or Debian Bookworm with KVM/Qemu
Docker/Kubernetes: Portainer CE version as a VM in Proxmox - https://github.com/portainer/portainer
Collab software: https://github.com/nextcloud/server
Server Backup: Proxmox backup server or Borg backup/Restic
Client backup: Borg backup/Restic

Most of my data are on 2x16TB HDDs running an mdraid1 and then I backup it all to a usb drive with Borg Backup.
The os.qcow2 files live on my m.2 NVMe and are manually backuped to the mdraid1 before running the borg backup.
I should automate the borg backup but currently I just do it manually a few times a month.
Would also like to have two usb drives and keep one offline in another part of the house but that’s another future project.

Kinda feel like that infographic is a good startpage and works good in tandem with more in depth material.
A part I really liked about the pamphlets they sent out is that they have checklists for the different home prep parts, f.e.

The french version is awaiting approval, but the swedish version is available in english here - https://www.msb.se/sv/publikationer/om-krisen-eller-kriget-kommer-pa-engelska/

Open them up with a screwdriver and then either smash the disks inside or continue dissassembling it for fun before destroying the disks.

I went for a tiny Ryzen 7600 (no X), so it comes at the cost of a worse cpu and worse gpu. :)

My server has a gaming vm with gpu passthrough (6650 XT). With my vm powered on and idle the whole server draws about 60w-65w. Monitor not included.

That’s true, if there’s no load then the difference isn’t much money.
I’m running a NAS, some game servers, a forgejo instance and a jellyfin server and more on my machine so it’s never truly idle and I forgot to think about that metric.

Ah right, that rings a bell. Proxmox and Ceph sounds like a perfect experiment for OPs hardware. :)
https://pve.proxmox.com/pve-docs/chapter-pveceph.html

Yeah, I focused on the I’m just looking for some fun experiments, projects part.
I wouldn’t use the machines for anything other than experimenting for fun, they’re power hungry too if counting per performance.

I would look into setting up a proxmox cluster with high availability on them and from there you can look into fun projects that you can run as proxmox vms or lxcs.
https://www.xda-developers.com/proxmox-cluster-guide/
https://pve.proxmox.com/wiki/High_Availability

edit: HA seems to require a shared disk, such as a SAN or NAS.