Behold: the Shaman: a Russian 8×8 ATV with space for one driver and eight passengers.
Seats and benches convert into bunks; independently suspended wheels and low pressure tyres smooth out jagged terrain and 45° slopes while a boat shaped hull, integrated propellor and high performance water pumps allow for amphibious travel.
Yours for around 12.4 million roubles (€200,000)