$300 per machine. Issue is that ransomware also encrypts all files on shared drives.
But a problem with the approach of centralization taken by something like ChromeOS which uses Google accounts (or I guess Win10S which uses ms accounts) is that you're attempting to prevent one player from holding you hostage by giving yourself hostage to another. This is not going to work to prevent paying through the nose, although yes, your new hostage takers will probably realize that the NHS will be able to pay more when it actually takes care of patients. Not too well, of course, good enough to make sure it isn't replaced or repealed. Badly enough so that constant complaints ensure a fresh budget injection every quarter.
They're already being held hostage by 1000s of companies who won't update their crappy software so it runs properly, allowing them to install OS updates rapidly.
As I said, like ChromeOS, it's perfectly possible to run your own servers, don't need to pay Google or Microsoft.
But a problem with the approach of centralization taken by something like ChromeOS which uses Google accounts (or I guess Win10S which uses ms accounts) is that you're attempting to prevent one player from holding you hostage by giving yourself hostage to another. This is not going to work to prevent paying through the nose, although yes, your new hostage takers will probably realize that the NHS will be able to pay more when it actually takes care of patients. Not too well, of course, good enough to make sure it isn't replaced or repealed. Badly enough so that constant complaints ensure a fresh budget injection every quarter.