The backup time depends on the backup system, the backup network, and the Domino system. In one site the Domino servers had 4 SAN arrays and a dedicated backup network. The backup job ran concurrently so all 4 arrays were being backed up at the same time. Obviously that arrangement will backup more data than a more simple scenario.
You will need to setup jobs for full backups of NSF’s, incrmental backups of translogs, full backups of any NSF’s that had their DBIID changed (by running commands like compact -B), and then a job to “inactive” the backed up trans logs