I have already posted about Barramundi that makes great voyage cats, like this one, the 50ft.
A big Cat is necessarily expensive but Barramundi aslo propose an inexpensive cruising coastal alternative, for those that don't like to go slowly and are willing to camp on a boat. After all on this one you can go to the coast and even camp on a deserted beach. An interesting one
Minibee | Barramundi boats