I use these shower curtain rods for the lighthouses with some clamps. They clamp between floor and ceiling with tension and you don't need to drill any holes. Its sleek looking because you can hide the cable behind the rod, its cheap and non permanent. Just get one for each basestation and some rod clamps like mentioned above.
Here is some reference. Just order them in the right length. They don't need to be cut and are springloaded.