anything full size and 4x4 will have similar mpg to an antar that the army use to transport tanks.
itl also drive like a bag of dung on the road with the associated ridiculous cost of spares being a specialist vehicle.
anything else full size will be garbage off road regarding traction and ground clearance.
why dont you buy a middle range 4x4 gruntmobile pickup and slap a proper demountable on the back and have something worth having instead of a no cred ex prison van ambulance,or whatever.
they make great practical campers,but mostly unsellable because of hat they started off as no matter how good they are finished off.
you will also have a proper boys toy to play with once you lose the demountable.
