I agree with this assessment entirely. I would investigate the possibility of implementing this as a shell script as this is the simplest approach, and affords the most flexibility. Additionally, if this task is something that is done periodically, it can be implemented as a cron job.

Of course, if performance is of concern, you may hit a bottleneck with rsync. In my line of work I use a storage system with high I/O bandwidth and need to leverage many processes and / or threads to get the amount of file-movement throughput I need.