The (free) cloud version is certainly past the beta phase. For about a year now IIRC.
What you might be more interested in is "just" to have a local server instead of the free or premium cloud. But it is easier to make that judgment if we know what the complete situation is we are looking at (like, how many licenses / users are we talking about and how would that change if you would complete replace BO).
I'll contact you for some additional questions. Maybe we can find a creative solution and/or get you a temporary test environment. Can't make promises as I am not in sales.