Hard Disk Monitoring

I only realized today I got a response here (I assumed I would get a mail when someone did, which I never got); thank you for that extensive and exhaustive answer! This sounds perfect for me, so I will be getting that family plan and set it up like described above.

Hello, I am interested in finding a solution to running Sentinel on my personal, private machines, of which there are a physical server I rent from Hetzner as well as three little Raspberry Pis I run at my home. I saw there is a corporate license, but the cost is clearly aimed at actual corporations...