The home server is back to native FreeBSD - the operation required less than 10 minutes - most of them have been used to unplug, take it to the upper floor, replug - unplug it again, take it back to the lower floor, and plug it back in.
Everything's fine.
Everything's working.
I'll document this setup on a blog post, in the coming days.
The power and simplicity of #FreeBSD always win.
Now, time to go out for a nice Sunday out!