How it started: mp80
I bought a MiniPC (Blackview MP-80) to run Home Assistant and some lights etc. to go with it.

It's now exactly one year later this is what my setup looks like now:
BMAX B2 Pro --> Home Assistant OS
Blackview MP-80 --> Proxmox --> Nextcloud-AIO & Immich
ODROID H4+ --> Proxmox --> TrueNAS

How it's going: odroid
With the heatwave in Europe I've now installed cooling to keep my HDD's from heating up.

I know it's very Janky but I love it, the plan going forward is to buy a 3D Printer so that I can 3D Print a custom 10" rack, and I'll build my own cooling and temperature monitoring system with ESP32 and create a dashboard for it in Home Assistant and sorting out networking.

It's a work in progress, having a lot of fun learning and adding new things.