Low costs I mean electronic elements consisted of ip camera, microcontroller, sender and receiver controller which all cost in about 200$
Then add in the cost of chassis, batteries, motors, gearboxes, motor controllers, etc.
Also, the greater the power requirements the bigger the batteries which means a larger chassis, motors, controllers. Very roughly I would estimate another $200 to $800 for this for each Bot.
Is this still "low cost"?