If you do not want HD at each of the satellite sites and don't mind each TV showing the same thing, then it's easy and will cost less than $10.
I have the main TV with a HD connection. I also connected to the RCA jacks on the back of my receiver and put a simple RF modulator at the other end. This allows the signal to be converted to a standard coax which is in the wall and you can connect at each TV.
As mentioned...the downside to this is the only TV with HD is the primary one. All others are SD. And, all TV's will display the same channel. The upside...only one receiver needed and minimal cost required.
I also purchased two RF remotes which allows the receiver to be controlled from any room. It works for us but may not be optimal for everyone.