I've been using the Dahua 5216 regardless of how many cameras I install. I get it so cheap from China, I order 5 at a time. And, my customers appreciate the spare channels for future add ons. I also make sure to let them know I am spending alot more money on a 16 channel NVR just for them. I tell them that they are the only ones I did this for, lol ! It makes them feel
good and it makes me look good. For hard drives, I've been using the WD red series and always 3TB. I'm sure anyone can just online and find images of the cameras and NVR and figure
out prices. Even if they do, and complain about price, I just say, but in a nice way, than you should have just purchased the cameras and crawled through your attic, climbed up on the extension ladder, snaked through your walls, programmed your router, etc, all by yourself?