Correct, cameras should be just above ground window level, high enough so you can't reach them and low enough so you can get faces. Totally pointless putting them at roof level. I have one above my garage door, someone tried to open it 2 weeks ago and he looked straight at the camera, local PC recognised him and warrant issued for arrest as he was on parole.
If you want decent CCTV then buy proper HikVision, not HiWatch (which is now discontinued). I would recommend turrets/dome cams too unless you really want everyone to know your have CCTV, in which case buy bullets. HikVision do cams in black too so can blend in to black downpipes, i'm not a believer that CCTV is a deterrent, more that if you have CCTV then you have something worth stealing, so i'd rather them be discrete. POE is easy to fit yourself, the only difficulty is routing the ethernet cables.
I'm sorry, but you cannot use that picture of my husband without his express prior consent..............
Can you mix and match with these? I have the hikvision 3mp bullets. Wonder if these are compatible in the 7600 series NVR??