Is there a price? Taking a raspberrypi zero, a camera, 4g modem, a couple of batteries and a charge circuit can turn any large-enough object into a hidden came

Is there a price? Taking a raspberrypi zero, a camera, 4g modem, a couple of batteries and a charge circuit can turn any large-enough object into a hidden camera, for <$100 + the price of object itself (+ some dremel-ing and superglue).