Ah, and you mentioned, "Seaworthy". Gulf stream crossings and sailing in open water can be tough on you and your vessel. The best thing to do is watch for the weather windows so you don't get caught in situations that might challenge your skills, gut and boat's ability to stay safe. Boats have classificatons of safety called "Design Categories". Category A: is Ocean - designed for extended voyages where conditions may exceed wind force 8 on the Beaufort Scale with significant wave heights of 4 m (12') and above and vessels largely self sufficient. Category B: is Offshore - designed for offshore voyages where conditions up to, and including, wind force 8 and significant waveheights up to, and including, 4 m may be experienced. Category C: is Inshore - designed for voyages in coastal waters, large bays, estuaries, lakes and rivers where conditions up to, and including, wind force 6 and significant wave hights up to and including 2 m may be experienced. Category D is Sheltered Waters - designed for voyages on small lakes, rivers and canals where conditins up to and including wind force 4 and significant wave heights up to and including 0.5 m may be experienced.
There is a lot more info out there you can query concerning maximum loads for boat and gear and weight estimations for such gear and boat. A boat that is about 11,000 lbs is considered "light" and minimally acceptable.
Boats that are better equiped for off shore use have superior construction and hull to deck and keel construction, lifelines and railings that are adequate for heavier loads, windows that are not too big and can withstand crushing waves, a higher bridge deck instead of a companionway that is only inches off of a cockpit floor, scuppers large enough to ship water out of a flooded cockpit quickly, good and strong companionway drop boards, which should be in place during extreme conditions, an engine powerful enough for extreme conditions, to name a few. Deck hardware for safety purposes are other things you need to think about, espcially if single handling. That's my 2 cents.