I don't see what's wrong with option 4, it is a matter of owner's preference. I like to used proven product that is used by professional.
I might be wrong but it looks like that option 4 is design for a high end consumer user, not commerial use.
Two month ago, I rented a sissor lift that lift the platform 19ft high. This platform weight 2 tons and the trailer weight 1 tons, a total of 3 tons (6000lbs).
This trailer only use pintle loop because all commerial trucks comes with pintle hooks. The rental guy was stunned to see my duplex pintle hook on my "plastic" bumper on SUV. He crawled underneath to see the hidden rear crossmember for himself.
It went well as long my speed remained lower than 20 mph max over short distance.