Most selfhosted distros have some/all of these features baked in: yunohost, freedombox or libreserver come to mind (note the latter is maintained only by a sing

Most selfhosted distros have some/all of these features baked in: yunohost, freedombox or libreserver come to mind (note the latter is maintained only by a single person). "Identical setup within seconds of failure" being the exception as you need to deploy from backup which can take minutes/hours (depending on backup size) even if you have the spare hardware. Fortunately, that's the least-needed feature in your list.