[mst]

I'm also quite impressed by cbsd - shttps://www.bsdstore.ru/en/about.html - though that's more of a 'maximum overkill' solution in spite of being a CLI/TUI driven tool.

Currently I'm going through a phase of building and managing jails with just the stuff in FreeBSD base, but that's entirely intended to only be a phase - it'll last until I have the way all of it fits together burned into my brain well enough to be confident debugging it, and then I'll stop banging rocks together and go back to using higher level tools like a sensible person :D