Suicide drones make much more sense than this stuff for large munitions. All those engines and batteries for a platform that’s very likely going to be destroyed anyway. Those cardboard, rubber band catapult launched planes are much cheaper.
If a $2k drone takes out a tank and crew that can’t be easily replaced, that’s still good bang for buck.
Is the purpose of this device to remotely mine areas where enemies currently aren’t, or to attempt to drop mines directly on enemies? The former task seems suited to a reusable drone.