One-click updates work from the dashboard? I don't think they would.

Of course you don't have to go the proxmox route, but it is an easy route.

I have a proxmox cluster, so moving things between machines, high availability, and backups are a breeze. Had an SSD go bad a few months ago, and I just moved everything on that machine to another node until the new drive showed up. It was a pleasant experience.

There's plenty of other ways to achieve this, but this is what I chose and I'm happy with it. It's simple, and I can manage everything from my phone if needed.