Yep. Two iPads for 3 family members here. It's enough, but you have to remember on which one you left your stuff. If it could seamlessly recognize who picked up the tablet and switch to their stuff, no matter what ipad it was originally on, that would be magic.

I wouldn't even mind having a sync server in the house (a desktop mac, maybe) to help with that.

Yes, I'd really appreciate being able to hand my iPad to my daughter knowing she can only access her apps, and ideally for a set period of time. They seem to have this working reasonably well within macOS users.