I will probably get shot down in flames here but have you considered a Catamaran for live aboard? This isn't bait for a multi/mono debate.
Advantages: -
Living space all on one level, less motion in heavier seas (though a very different motion), obviously sails a lot flatter, better performance, a 36ft cat has the interior space of a 45ft mono, the wife will love it, you can sail at 8+ knots and you won't spill your beer, no gimbaled stoves or need to tie everything down, run your watch from the dry comfort of the saloon with an autopilot remote.
Disadvantages: -
Cost, they are a lot more expensive to buy and to berth, much more sensitive to weight so leave the best china at home, feel, they don't give you the same feedback as a mono.

Worth a thought.
Adaero