What is the drone for a low budget production
The DJI Mavik is one of the most affordable ready-to-fly drones with enough quality (4K) for expert-looking video production. 

Alternatively, you could strap an action camera, like a GoPro, to a non-camera drone. You'll likely have to heavily stabilize your footage in post.

In the lowest of budget situations, if you just need a top-down aerial shot, simply rig a phone to some tethered, helium filled balloons. This has worked well for me in the past.

In any case, there are a few extra steps you can take do to improve the footage.


Buy a lens filter kit including Neutral Density and Polarizing filters for the camera.
After importing the footage, correct the wide angle lens warp in After Effects.
Color grade your final cut