I am looking for a Drone which can flying for more than 30min + 45Kg Pay load(Not including Drone's body weight).
If you have any informations, please let us know by return email.

My contact e-mail is ;

[email]shpceo@hotmail.com

Richard Park

45 Kg payload ??

That would almost be a helicopter. No such drone exists for commercial use. Try nasa or nato, they may have one spare.
The bigger octocopters can carry a DSLR weighing  5-10 KG max, that's the end of the game.