I found drywall patching to be a rather straightforward if not somewhat artistic skill. In a way, I am now sorry that the job is done since it was so enjoyable. But you always have the option to hire an expert for both running wire and finishing work. Many satellite dealers have become quite adept in this area. Six rooms all receive the same audio signal.
Niles also manufactures a line of in-wall speakers.
I purchased their HD650 and HD525 high-definition loudspeaker models. The installation was surprisingly easy since a template of the hole to be cut was provided. Of course, I took great care in cutting into walls, as with fishing the wires, to avoid disturbing electrical wires or other infrastructure. The instructions provided by Niles were quite detailed and offered useful guidance. I adhered to the general rule of thumb that one pair of speakers should be used to provide coverage for every 100 to 200 square feet of listening area.