Shen,
If you'll notice after about 70 feet most of these boats come with crew
quarters for the reasons you state. A boat that large involves a lot of work
that most people that can afford the boat can also afford someone else to do
the work. I'd guess 60 foot would be the upper range for a couple to
operate. Have you ever heard of an insurance company denying coverage due to
experience?
Paul

"Shen44" wrote in message
...
Can't give you a definitive answer, however....
60 feet is not a criteria for a license in the US, though it could be
other
places.
Insurance will play a big part as to who operates this vessel.
Where you register/document it will also be a major factor (amazin what
you can
get away with when you have enough money and the right contacts)
BUT, if you can afford a ship that big, why would you want the headaches
associated with being the Master of such a vessel? Hire some flunky.

Shen