Looking for suggestions for the best way to backup and manage multiple iPads?

Here's the scenario:

I have gotten my aunts and my mothers iPad2s because I thought it might be the easiest way for them to enter the internet age (They are all over 75).
Each of them likes different application and games. I have originally set up a different Apple ID for them. But found backing things up to be a mess.
I have to create a different user account on my computer just to back up their iPad content in iTunes to avoid things getting mixed up.

If there's a better way, please let me know. I am curious how companies manage their iPads.

Thank you in advance.