So its a large robot smart sprinkler?
The trouble with this being useful is that it would be very expensive. Generally where there is a structure to protect there is a road to that structure. No need to heli in these things.
Where structures are inaccessible by road there is good reason. It would be steep terrain, likely very remote. These devices would simply roll down the hill/mountain.
One thing I could see these working for is Pipeline pump and valve locations. Again, generally accesable by truck.
Having them be so heavy is a major concern. There are many helicopters all over the place in Canada that can lift around 2-3500 pounds. Above that and the list of operators gets much smaller.