Sounds like a neat puzzle. The real challenge is keeping the power and control buses consistent while you flip the chassis. You need a rigid, low‑mass frame for the rover, then a lightweight mounting system that can pivot to let the rotors deploy. Make the transition logic hierarchical: the rover’s GPS and SLAM hand over to the quadcopter’s altitude control with a simple flag, no extra software stack. If you nail that, the rest is just fine‑tuning the mass distribution.