drone GCS api setup based on qt, mqtt and python

I will be using Pixhawk (dronecode.org, px4.io, ardupilot.com) open source and want to create API for controls and fusion filters for the said frameworks and to be used with Qt-based GUI.

rqt example:
https://youtu.be/CyP9wHu2PpY

Project budget: 100USD
Term: a couple of weeks at most

example of api: FC sensors, GNESS, aux sensors, camera etc.