Although I've had some success on some small projects, I am a relative Arduino novice. In this post I'm looking for a gentle shove in right direction. The project is: From a cabin on 4 acres of land I'd like for someone who is not on the property to speak in some manner to a person in a structure 75 yards from the cabin. The cabin has phone service and is connected to the internet using a router. The property is unoccupied most of the time.
Specifically, this is a gun club that is unsupervised but has cameras that allow for remote monitoring. Ideally, if bad behavior is observed through the cameras, contact can be initiated to correct the behavior real-time.
What technologies should I research if this capability is possible?
Thank you for you time and advice.