[Jerrrrrrry]

You cannot protect hardware, just the things that flow through it, for a brief time.

Buy a random older computer with cash. Nothing critical needs more than 512mb anyway.

Faraday caged, WIFI/Bluetooth/EM sensitive heartbeat monitors, decentralized fail-safe Live feeds,full air gapped setup with UPS, white-noise machines, and only transmit data via QR codes.

Hope the monitor you chose to display QR and the web-camera are also faraday'd.

Hope the computer you are using to display the QR never gets compromised, and the QR-code reader, at the same time.

It's easier to send a squid-team with a $5 wrench.