i've assembled the frame,
got tarot 15" props and 6000mah 4s nanotech lipo, sj4000 and 3 axis gimbal from quadcopters,
for the choice of motors i need suggestions,
requirement-20 min flight time with go pro

http://www.foxtechfpv.com/sunnysky-281411-kv-700-motor-p-382.html
These are on my wish list.