+1 for frigate in a docker container. You can run it on a pi. If you want object/person detection (which helps a lot in alerting/notfiying), then a coral usb accelerator is also a good add on to the pi. Lastly tailscale for remote management. Camera wise I prefer amcrest, but reolink are also good. Wifi can be finicky, but will work as long as you have signal. You will still likely need a power source since battery cameras don’t last long at all.