The use of drones for firefighting is not something new. The drones used in this case are of around $30K, which is a bit expensive.
I am completely sure that designing a specific drone in any University will be for a fraction of this money. The University of Melbourne (Melbourne School of Land and Environment) and the Department of Mechanical Engineering and Mechatronics is designing a specialised drone (Octocopter) for grapevine water status and growth monitoring. This same project will incorporate stereoscopic cameras to be used for yield prediction models.
Link to video and article of firefighting drones: CLICK HERE