I'm curious about what you're issue was finding cameras as, to me, that's the easiest thing to find cloud free since they have a long history of being used in closed networks as POE, onvif cameras long before smart homes were really a thing.
# Some of them are limited to 25 fps
# The model name are really a mess
# Some models are without hardware reset button, the only way to reset is register device to Dahua's cloud service with China phone number (although it is not enforced)