Look for the night vision range of each camera and consider how much area you want to cover. And beware of using an indoor camera to look outside; they can’t usually capture images through a window or after dark. You cannot use cameras alone for home security. That needs a different approach of boots on the ground, regular patrols and guard dogs, proper perimeter fencing, security floodlights, sirens, physical access barriers, electronic barrier breach detection with security cameras being one of the devices used. Considering just the camera part, a security audit is needed to identify weak points, and how to address them one by one with the optimal number and placement of cameras. Apart from physical security, one issue with wireless
cameras, and in particular IP cameras is whether they can be accessed from an external network, how frequently vulnerabilities are patched so the window of available exploits remaining viable is short, and how to secure the vast amount of data generated, all to ensure that someone isn’t using it to monitor a range of targets
over time to learn patterns/routines.