I had run the tests on my HP Z600 workstation for convenience, but it's obviously ridiculous to run such machine 24/7 for a small server. So I reinstalled the entire server on a Dell Precision 3650 i7 that I bought at auction for €150. Power consumption is very low, as measured on the UPS: 0W in deep sleep and 50W under load. If I assume 3 hours of use per day, it costs me less than €1 per month.
I think, that has sense only if you use the server not only for caddy and fossil.
Oracle free tier offers a virtual machine with 200 GB in which FreeBSD 15 can be installed.
To deal with the cloud to get it, was a torture for me, but when you have the system running, all is simple.
In spite of it, I run my fossil repos on a VPS for 1 EUR (500 MB ram, 15 GB disk) running debian.
Oracle can retract the offer, paying I have my server as long as I pay.
Well, your powerful server at home for the same price is financially not bad, but in spite of it,
I like to have the server far away.
For the domain I pay about 5 EUR a year.
May I ask why jail is in this case so important? I never needed jails. I like simplicity.