If you haven't yet learned about the Sherp ATV, you should look into it. This vehicle is known as Man's Big toy and is made in Russia with great off-road ability.
Incredibly short wheelbase, huge tires, and a good sealing mechanism that allows it to float. It has a taxiing steering system that is highly maneuverable. With only about 44 horsepower and a simple interior, it looks like a Tonka toy but is not simple.
The Sherp ATV has huge, self-inflating tires (1600x600x25) that allow it to clear obstacles of more than 70cm, or possibly do a backflip attempt. The turns are like a tank, but it looks great everywhere.
Under the body, the Kubota 1.5-litre turbodiesel engine delivers 44 horsepower. It's not particularly fast—it reaches only 45 km/h on land, with a five-speed manual transmission. It also has a speed of 6km/h in water because it can swim, too. It weighs only 1,300kg and the body is essentially a steel bathtub with some drivetrain attached to it. Safe to say, it should be fairly easy to maintain.
If you want to own this lovely beast and boldly explore almost any terrain, you'll have to pay a minimum of $115,000.
Here is a summary of the cost and pricing details for Sherp ATV products.
Sherp Pro $115,000
Sherp N $126,000
Sherp Ark $375,000
Sherp Trailer (pull behind) $8,000
Sherp Trailer (transport Sherp) $8,000
User Sherp $95,000 to $100,000 (with AC and other accessories)
Accessories such as wheel well fuel tanks are extra. Prices are in USD.