Carboot drones for SAR?
If it's cheap and cheerful enough, a boot full of propellers might be just the ticket to guide mountain rescuers better, if the victim doesn't have their phone on. There are conditions that make life pretty miserable for the manned aircraft and foot bound searchers, and a drone that you're willing to accept might be disposable could make everyone's life safer, at some cost.
Once you start needing to book satellite time it starts getting tough to imagine it's cheap enough.
The firefighters killed in Arizona last spring might have benefited from a bit more situational awareness in bad flying weather too.