catalina 30 cruising
We have a C-30, and purchased it for exactly the reasons you state. We also have cruised the Bahamas, crossed the Gulf Stream, and cruised the Gulf of Mexico. We did those things on friends blue water boat. We would be hesitant to do it on our C-30 [which we sail in the Great Lakes]. We may be overly biased, but conditions can get tough for live aboards and we would prefer more than a light coastal cruiser for living aboard and sailing the areas you are planning. Maybe keep looking. You should find a boat in the middle that will be "blue water", livable, and affordable.