I dont think he will be coming back & reading this thread
But if he does then!
Go for a DI engine,can try a Thar Di but you need to strictly consider a 4x4
Some of the old mm540 & 550Dp can be a bit tiring to use but they get the job done. Also remember to be buddies with a good mechanic when you decide to buy such a vehicle.
Also worth a look Bolero camper.