I am no network guy, but i managed to get my cameras and NVR up and running, and newer models NVR are more easy to deal with and finding the cameras, i would almost say plug and play, at least that's how my friends NVR felt like when i was setting it up for him.
I assume using one of the other HD connection formats are even more easy as its HD over a coaxial cable ?
People spend +700 USD on a phone today, at least as insane a investment as our hard drives was back in the day.
PS. my friend first got a qvia NVR and that was BS as it dident play ball with non qvia cameras, though it are just a re-branded Dahua machine.
Both my friend and i are now on Dahua boxes, mine with build in switch my friends with external switch.