David Ballinger, the creator and designer of the MetroShed has spun off his latest project with a similar modern aesthetic and focus BUT this one floats — it's the MetroShip Houseboat...The prefab luxury house boat has an open concept floor plan with a large living area, central kitchen, master bedroom and bathroom. Outfitted with a high-end media center (speakers, HD projector), central heating and air conditioning, it also has high end appliances from Gaggenau, Viking and LG.
You can see more information and images at the MetroShip site.
The base price of $239,000 seems not-so-unreasonable as one might expect (after all, it is a house AND a boat!). Perhaps I need one of these at City Island?