In reply to Alec Kinnear.

"If you have a lot of sites to manage, ManageWP, MainWP and InfiniteWP (unlike BackupBuddy which can’t handle large sites reliably) will do rock solid backups for you without per site monthly expense"
Yes, this is exactly our case. Furthemore, I bought lifetime subscription to MainWP and all needed extensions/addons so we don't have any monthly fees at all, regardless of number of sites we take care/maintain.

I have also BackupBuddy Gold licence but, in practice, found out that MainWP for us is more easy to use in everyday maintain activities.