A couple of inexpensive PIR sensors and a couple of wireless IP cameras. Sensors can trigger video camera, then images uploaded to cloud. Or just use the senso

A couple of inexpensive PIR sensors and a couple of wireless IP cameras. Sensors can trigger video camera, then images uploaded to cloud. Or just use the sensor built into camera (not as good). The same sensor can alert your phone, and send image after which you can choose to alert cops or take more pictures or trigger alarm or even talk to the intruder all from your phone. Some security cameras have "alarm out" and "audio out" for connecting optional alarms and speakers. I like Lorex IP cameras, but there's plenty of choice.