Does anyone have experience with really long flight times? Like, 3 hours, give or take for battery swaps. I would be concerned about continuous heat on the motors. I have a friend who works for a media company and is considering a P4P kit with 7 batteries 
I'm wondering if stepping up to an Inspire or Matrice would be a better idea.

I'm wondering if stepping up to an Inspire or Matrice would be a better idea.