I have been performing many, many tests. From a "cost" efficient solution as well as what I am hoping will prove to be "the best long term" solution, at the moment, I am recommending the use and implementation of InfiniteWP (which is more than just a backup tool). Their tool "does not" do everything (at the moment) that I had hoped BackupBuddy would do, such as allow us to not only backup and restore single as well as multisites (which InfiniteWP states their product will do), but in the near future (they say within a few months), .. it will allow us to "mirgrate" multisites to new domains (as well as single sites within a multisite) to new domains.
They offer a 100% free version of their app that you can test with. And if you want (which I am sure you will) to "automatically schedule" backups to happen for your sites), they have a premium addon available for that.
But after looking at numerous WP plugins, of which some can do this, or that, .. etc., InfiniteWP seems to be looking as the best (from what I've been able to test so far).
As I get further down the road of my continued testing, I'll certainly post an update here. Backups, restoring and migrations are one of my top priorities and concerns when building and maintaining websites, so this is a "really" important issue that is effecting me.
I was so sorry to hear that BackupBuddy decided to pull out of supporting their backup plugin for "Multisites" and I hope they reconsider. Their product is absolutley fabulous. Every day, I wake up hoping to get an email saying .. "Backup Buddy now officially supports Multisites" but .. if it happens I just doubt it will be anytime soon.
In my conversations (via email) with InfiniteWP, they seem on the ball and will be adding the functionality needed for backing up, restoring, migrating single WP sites as well as multisite.
Stay tuned .. and .. thanks for sharing your comment.
ncsumarit ... thanks!!