Upload & Sell: Off
If you use an Apple Mac, than the Time Capsule forms a pretty good system for unattended backups. But, as pointed out, I certainly would use additional methods to backup images, LR catalogs, and other important work.
I use the Apple Time Capsule with the Time Machine software as a main backup for my mac. I also use several USB-3.0 external drives for backups on my Lightroom catalogs and wedding files. This way, I'm pretty much covered if I have a failure and I keep my images on the external drives in two different locations. I also do this with all my client documents and my wedding database.
My Time Capsule backups every hour any changes that it detects, it backs up.
BTW, my wife has a Dell Laptop running Windows 7 and I have a backup program running on it that is configured almost identical to the Time Machine software on my Mac. It backs her laptop to the Time Capsule every hour. Restoration is about the same. The software for that is: Oopsbackup
It is touted as the Windows Time Machine.
Both Time Machine software and OopsBackup can backup to any drive, I like the Time Capsule because it handles my wireless home network and my system backup in one box.