Long duration is going to require a fair amount of experimenting unless you can find someone who has done it. and copy it exactly.
You'll want large diameter, relatively low pitch props turning relatively low rpm. The higher the tip speed the less efficient the prop and since you are hovering on the props its all about getting maximum efficiency.
Maximum speed will be less than typical.
Duration plus payload carrying (like even a Go-Pro camera) is even harder, because you need to carry a lot of battery for duration.
It will require a complete system built for the purpose... just saying "I think I want these motors" might be a start point but each choice you make will limit other choices and thus direct the result to one inevitable conclusion.
I would be surprised if a quad has a longer duration than a conventional CCPM heli... the heli will have a significant advantage in lower blade tip count. Each tip is a significant source of drag and that means inefficiency.