Good post, John.
I think I and maybe we have always been fascinated by a dual system of a cloud solution downloaded every night to a hardware and networked solution.
Taking a break from something else, so working backwards

It will be available within 60 days. We have been told that we go too far out of our way to not talk about what we do, so let me strike a middle ground and just say that because of a client request, we have come up with a Disaster Recovery/Fault Tolerant solution that allows a practice to have a Hosted/Local AC "server", as well as a Local/Remote backup of the "server" that includes DB and Imported Items/Directory copy. In the event that one goes down, you have the other as of the last backup.
We can even move that install onto different hardware, ship it to the client while they continue to run on their backup system (Local/Remote), then sync once the new hardware is in-place. It is obviously not free, but it is the product of adapting Enterprise technology to what a independent practice needs to operate in the midst of an outage of some sort.