Just loock at
www.geronimosaintmartin.com.ar
He was 10 years sailing in a 18 foot fiberglass sailing boat from Bs Aires to Artic pole and returning to la Patagonia.
I meet once him in Colonia yacht club in Uruguay and saw the boat. If that was possible over 10 years so you can trusth in Hunter, Benneteu, Jeanneau and all other boats to do everything.
Also in Piriapolis, other port in the Atlantic coast of Uruguay, where sailing boats coming from France, Germany, Spain, etc, where the cruisers prepare the boats and them self to cruise Cape Horn and Antartic, you will find a lot of not traditional sailing boats made of fiberglass, wood or steel that were not made so strongs like Hunter or Beneteau. They also are some years at sea and still doing miles without this worry.
Hope you will excuse my English.
Ric