If your really going to live aboard?
The Hatteras is hard to beat. There are some things that become more important when you live aboard that may not be obvious when you use a boat recreationally. All of the Hatteras's offer larger spaces for heads, closets, salons, and staterooms. Part of this is due to the wide beam and the other is they didn't try to cram lots of small staterooms in a 48,58' boat. The galleys used household appliances, stacked washer and driers, lots of ac outlets, and enough shore power to not have to manage electrical consumption. Loose furnishings in the salon allow for flexibility and really comfortable furniture of your choice. Reverse cycle heat and cooling is zoned and effective. Windows and doors have tinted laminated glass and robust frames. At anchor and at the dock these boats are tighter , warmer , cooler and quieter than lighter built boats. They also have enough flat section in their hulls to rest rock solid at the dock. Wakes are almost never a problem. There are probably more older Hatteras's used as liveaboards than any other yacht brand, houseboats excepted. This is not to say they don't have issues. These are complicated boats, especially in comparison with a sail boat. At 30 to 40 years old they are getting long in tooth, all of the systems are robust and expensive to replace. They have a history of soft decks as all decks were cored. If penetrations were neglected and water has entered the coring you can spend big bucks repairing them. If they still have the older Onan generators, many have two, they are difficult to buy parts for. Fortunately the Detroit power plants are inexpensive to repair and pretty bullet proof. These boats are comfortable to live on, and that's the bottom line.