Yeah, forget the bouncy house speakers. In my eyes Atmos is something you do right or you just don't do it. A properly set up Atmos system can be pretty incredible. Shortcuts and bouncy house speakers, not so much. I think the most I'd be willing to compromise would be a speaker like
SVS' Prime Elevation speakers mounted high on the wall and in the most optimal spot(s).
Okay, it does look like Klipsch has their "elevation" speakers too. Here's one model.
There are others too, those were just the ones at the top of my page.