Large family problem (we are 8)

I agree with KKWilliams... These full size are solid tow vehicles. I often tow with the similar sized Ford E350 extended van capable of seating 15, but we take out the back two rows, making lots of cargo space and seats for 8.
I actually prefer the Chevy 3500 extended, because They stretch the wheelbase 20 inches, while Ford stretches the rear overhang on the extended vans. Not as stable towing.
But tough to argue with these numbers...