Good idea or bad?

We have a problem in our house of the kids' rooms being impossible to walk in with all the toys and books. I've been thinking of moving them into one room and moving all of their toys into the other. I know that I would need to buy a mattress for the top bunk and a tv stand for the "play room" since right now their tv is sitting on a little play table. They want to play in the table so get annoyed that the tv is sitting on it. I wondering if putting them in the same room for sleeping is just asking for more trouble. Ya know? Will they sleep? Will they try to play? Will they wake each other up when one cries out in the night? Is this a good idea or a bad one?