Well, obviously. But it's not that hard to do sane backups even hourly, especially considering how small FA is relative.
Assuming you're not always doing full backups, smaller incremental ones would generate even less of a server load, as it only needs to do a small amount of data each time.
How do you think Google or Amazon keeps backups? They have more data than FA by many orders of magnitude. Assuming you aren't already pushing the limits of your hardware that much, you shouldn't have an issue backing up your data.
Also, incremental backups are a thing. You only...