professional installer for what? Can you be more specific. Like the others, unless your needing someone to do a total refinish of a basement, for example, this stuff is not that hard.

I used 12 guage wire for my entire setup, but it is not required if your runs are relatively short.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85