We use the Rpi + touch screen + PIR + camera + siren as a simple gatekeeper connected to Home Assistant. Another project (Nvidia Jetson Nano) is used to recognize faces and to send the information to Home Assistant. The Rpi is powered over ethernet. In the housing is enough space to mount DC/DC transformer to get 5 volts.
Related project, Nvidia Jetson Nano housing:
https://www.printables.com/model/424148-nvidia-jetson-nano-housing
The author marked this model as their own original creation.