Fire detection is not terribly expensive, but you would still need a way to either get the animals out of the barn quickly or fight the fire. The increasing size of farms often means that the people to do these tasks may be a long way away. The rapid depopulation of rural areas also means that the volunteer fire department may have difficulty reaching the building in time.

Fire suppression can be extremely expensive if you are not connected to a municipal water system. Pumps would have to be high capacity and the well or wells must either support the high pumping rates or there would have to be a pretty large tank below the frost line. A pond might also work if the soil would allow it.

Cavalier, no. A business decision in business that operates on very low margins, yes.