I'm looking at instaling cameras around the house and farm . How easy are theese to install . I had a guy round to look at the job but he never came back to me so i was thinkimg of doing it myself . I was told to get a good quality DVR and good quality Cameras . Id need at least 2 ptz cameras and maby at least 6 standard ones . So id be looking at a 8 channell dvr ??? What cables would i need to be running And where is best to get the cables conectors and cameras ???