For this kind of small scale setup, a reasonable backup strategy is all you need for that. The one critical part is that you actually verify your backups are do

For this kind of small scale setup, a reasonable backup strategy is all you need for that. The one critical part is that you actually verify your backups are done and work. Hardware doesn't fail that often. A single server will easily run many years without any issues, if you are not unlucky. And many smaller setups can tolerate the downtime to rent a new server or VM and restore from backup.