Well, these are much too complicated for 2 cameras residential home security camera.
I am thinking just 3TB HDD recording, say for a week, then insert another 3TB HDD. Otherwise, it just record over the same HDD. HD Analog 1080p with night vision.
Should I just choose kits like those at Costco - Swann analog DVR.
Or, I should pick and choose the DVR & camera & cabling.