The DJI drones are even too costly, the current gen of FPV drones used in the field capable of busting a BMP at 10km distance cost like 400 USD tops.

Longer range systems cost a bit more, but not a whole lot much more.

Improvements that are desirable are generally in terms of range, endurance, sensors and resistance to electronic warfare.

Copying the silent prop design from Zipline would also be neat to reduce the sound signature and give the enemy less time to react…