Greetings,
Years ago, I set up a backup tool that wrapped rsync. It has faithfully and
reliably backed up a dozen hosts and too many TB of data to mention, offsite,
automatically saving as many backup points as disk space allows.
You're certainly welcome to try it!
http://www.effortlessis.com/thisisnotbackupbuddy/
It works on an "ascending powers" basis, EG:
1 day ago,
2 days ago,
4 days ago,
8 days ago,
16 days ago...
....
until out of disk space.
=)