The Wall Columns are available for every room and have pretty open placement

New objects created by the community have to be based on objects from the game. There is no way around it at the moment.

I might create a new complete pack, where the underlying object is the leaf plant. Then you would be able to place the curtains probably in all rooms. I look into this tomorrow.

Is there a way these can be placed in training and staff rooms? They look wonderful but that's an unfortunate limit.

Of course!
Every item in this facility is ISO-certified for maximum feng shui compliance.

But does the carpet match the drapes?