There is no control ROOM and there certainly isn't offices for the operators. They do, however, have steel lockers right outside the break room.
And, yes, that's why they make $16 or $25 per hour instead of minimum wage. But there's very little cost above their hourly wage. I'd say 30% is very accurate, similar to what is mentioned in the professional article written by a professional writer who was actually able to hold down a job for longer than six months.