If I won the lottery and had enough land to use it on, I'd get one of these:
It's an Alvis Stalwart.
They were built as support vehicles for the British Army in the 1960s and designed to carry 8 tons of cargo across any terrain AND water.
Engine- 6.5 litre Rolls-Royce straight-8 petrol, 220 horsepower.
It weighs 5 tons unladen.
They have permanent 6-wheel-drive, with no differentials so you can't really use them on the road without breaking them. They'll top about 50 mph.
They are fully amphibious, with twin in-board Jetdrive units that mean it can swim at up to 5 knots.
Miles to the Gallon? Probably more like Gallons per Mile, but surely one of the most capable off-road vehicles!?
Jack