Old laptop at your own place + second old laptop at a home lived in by family or friend would probably work great for this.
Hell now I want to try this with two old but decent android phones - they would sip power and have a built in UPS and would blow a RPI out of the water speed wise. Throw a USB-C to Ethernet adapter on each and setup for HA (or if you were really lazy just a simple round robin DNS setup). Put one at a friend house and have them both setup with the free Cloudflare proxy thing and you would not even need to open any ports on your firewall.