'Least messy' is open to debate. I rarely cut drywall for new cable drops; I take my time, plan it out, and work methodically. A pro would be in and out in 5 minutes with each drop, cutting drywall at every chance. Repairing drywall is cheap. AV installer is $100/hour, just like an electrician or plumber, in my area.
3/8/14 at 2:24pm