It would be helpful if you were to give some idea of the weight/load/dimensions that you are planning to lift and how long you would need to keep it airborne. With that info, I'm sure you'll get lots of suggestions.

I did a project some time ago which required lifting an airborne metal detection system, GPS and auto-pilot which could fly pre-programmed coordinates for a 30 minute duration. Quite a challenge when considering that the aircraft also had to fit within an 6' long, 16" wide and 18" high box that could be checked in as baggage on a commercial airliner. I ended up designing my own and it turned out great.


Cheers,