Why was this posted to HN? There is nothing new or original in the setup presented. People have been self-hosting all kinds of things on commodity hardware for decades, even things said to be "impossible" to self-host like email.

Also, nobody should be buying an (overpriced) Raspberry Pi for self-hosting, when used mini-PCs are faster, more reliable (no SD card, better cooling), and often cheaper.

Finally, I don't think you should use Proxmox in a home setting: too much abstraction, too much overhead (mainly memory). Use Docker where it makes sense, and deploy the rest bare metal.