Hmmm, I like the one below at only 2.5 million.
Jelly-fish 45, designed by Giancarlo Zema is a floating dwelling unit for up to six persons. It's spacious dimensions are 10 metres high with a diameter of over 15 metres. The Jelly-fish 45 would be ideally situated in sea parks, atolls, bays and seas rich in flora and fauna. The Jelly-fish 45 allows the sea dwelling owners to live either above or below sea level in perfect harmony with the ocean environment.
Technical Characteristics Jelly-fish 45
Maximum diameter - 15 meters
Accomodation - 6/8 beds
Main structure - high density fibreglass
Deck surface - solid teak
Extensible gangway - electro-hydraulic in inox and teak with remote control
External views - electrochromatic system in polycarbonate
Observation bulb - 3 meter o.s.l. with structure in fibreglass at high density, acrylic viewports
Equipment - approved fire extinguishers, navigation spread
Water capacity - 1000 litre with autoclave system
Internal electric system - Two generator of 16.000W for service 24V light throughout, electric outlets for 24 and 220V
Air-conditioning - reverse system (108.000 BTU/h)
Power source options - photovoltaic panels on fibreglass structure
Certification - ABS
Cost - $USD 2,500,000
