Spots right, a lot of old control towers seem to have become listed buildings due to the heritage of the area or the airfield they're on.
This automatically requires the owner/occupier to maintain the buliding to its original standard, which in some cases can mean spending considerable amounts of doshh on them.
If you need putting off any further, most wartime towers were built in such a manner that today, they would also be very expensive to run in terms of heating and lighting, as well as the initial cost of making them habitable to the leagl requirements of housing legislation.
Now all you have to do is find one!