I suggested that solution because everyone is saying "they're only a two-man shop so they don't have the time and money to do things properly". Anyone has the time and money to do the above, and there's a 90% chance that it would save them in a situation like this.

Even if they lost some data, even if the backup silently failed and hadn't been running for two months, it's the difference between a large inconvenience and literally your whole business disappearing.