we keep it simple. our backup is our media mirrors (at least 2 per site). they serve as more than just a backup. they keep the videos streaming fast too.
we also make a copy of the data every hour and store it for 30 days. that has come in handy many times.
the most important thing to backup is the biller passfiles, especially if yours is shared by multiple billers. every biller should have their own passfile.
hosting is dirt cheap these days. just rent a backup/mirror.
or stop worrying about all that shit and come to PornCMS
#porncms