I wouldnt use wireless for security if it can be wired, especially CCTV. If you run Cat 5 to your camera positions you can either POE them (better but more expensive) or if your on a budget you can use AHD cameras with Baluns. I would also advise running cables for the intruder and a couple of cat 5 to the TV point that way you can use HDMI over cat5 to the tv from the recorder. All my light switch's are 433 similar to the Lightwave ones (I used to have lightwave ones but having a button for on and a button for off was too complicated for my keyholder) I have outputs on my alarm hard wired to 433 transmitters, same with the CCTV, and I have a 433 receiver wired to a zone programed as keyswitch for arm only, so I can get alexa to arm the alarm, but she cant switch it off.