Discussions

hi folks
I am newbie to multirotors, earlier i have made an 450mm quad with kk2.1 control board.
Now for a college project i have to make a multirotor which can lift a weight of 6 kg , it should be autonomous ,fail safe and have flight time of upto 30 minutes.
i need valuable suggestions on
1.which configuration will be better ? a quad/hexa/octo
2.which frame to use ?
3. which motors to use?
4.Dji Naza/A2 or pixhawk?
5. which battery to use?
the budget of mine project is $3000 more or less.
i am thinking to purchase a Futaba 14SG 14-channel 2.4GHz radio system.
what else i will need if i add a camera with gimbal and how to control it? 

Thanks.