Although I will install wireless systems such as Ring cameras, I always prefer hardwired CCTV systems. Wireless cameras knocked out with a $60 wifi jammer before they are even detected. I tend to stay with Zosi fsystems for most residential clients, as I find them comparable to retail brands that cost 4-5x more. Most home systems are 8 camera units, and average about $2200 per installation depending on structure.
I have personally installed about 300 cameras in and around central Ohio.