True, but the patch job would almost never perfectly match the rest of the area around it. Most wouldn't notice but you would which would slowly drive you mad.

"It'll take two trips to get just the first floor done. We'll take a radio with us but no speakers or cables. That way I can get an idea of the accoustics of the first floor and measure how long the cabling needs to be. It'll give me an idea of how many speakers would be optimal. I'd hate to bring only two but realize I needed three or anything similar."