Hi,
the backup is packed only 148MB big. I think at this size it's ok to do this daily.
Yes this backup includes your complete Veeam Backup and Replication Configuration.
Settings, Jobs, Tape Inventory (which tape has backup X), credentials (if you encrypt the backup), etc.
You can use this backup to recover an failed VBR Management Instance. Just install
a new server and restore this backup.
Regards
Marco