Total posts : 45366
You might want to think about carrier current. You should be able to hit the entire dorm and some small distance outside the dorm. I think North Country radio has some transmitters that will work for CC, there are also a few papers in the library here on this site.
Find someone in the electronics program to help you build the system so that it is safe. You might even want to build the transmitter to save a little cash.
