I have the crazyflie nano, comes in at $180. Camera would be extra, but not much more. You can get 1k in range with the antenna upgrade. There are also many other neat upgrades like inductive charging and indoor positioning. Buy spare motors and clips, or a 3d printer. Having some guards while you work on flight algos will be helpful. Try out some RL
This is a good one, the kind i was looking for. However, I couldn't find the camera option. Are you sure the integration is possible? Do you have any links?
https://www.bitcraze.io/crazyflie-2/