Best = run ethernet to the garage and use cabled cameras into a switch.
Sensible = use WiFi cameras to cover the external garage or set up another access point in mesh mode (assuming its in range) and use cabled cameras.
The WiFi solution more expensive but its way less work if you need to dig a trench to lay cable.
Sensible = use WiFi cameras to cover the external garage or set up another access point in mesh mode (assuming its in range) and use cabled cameras.
The WiFi solution more expensive but its way less work if you need to dig a trench to lay cable.