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Do you intend to upgrade by adding more cameras later on?If you think you need only 2 cameras now, get a 4 channel system. If you think you need just 4 cameras right now, go for the 8 channel. Once you start enjoying the security provided by your spanking new CCTV system, you will enjoy the option to add more cameras. But if you want that luxury, plan ahead. Do you want automatic redundant storage?Most NVRs can record only to one hard disk. This means data storage is not redundant – a hard disk failure or theft of the NVR would mean that you lose all your recorded footage.

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Ring's Protect Plus plan goes for $10 per month and doesn't require a contract. Monitoring for professionally installed systems tends to be more expensive. The ADT Pulse monitoring service starts at $28. 99 per month and requires a three year contract, but you also have to figure in the cost of things like hardware components, cellular backup, and installation. When we reviewed the Pulse system, our upfront cost was more than $3,000, with a monthly fee of over $60. Some vendors, such as LifeShield, will let you buy the components outright or lease them.