My 2p worth,
Land Rover, wether it be a defender or a discovery, will be easy to maintain and parts are readily available, both new and second hand.
I have a 200tdi 110 and a 200tdi disco, the defenders have an aquired driving position long distances can be uncomfortable. Disco is much more civilised
For your budget I personally would be looking at a Disco TD5 commercial, you will have a heap of change so you can tax (with it being a commercial there is no co2 related tax), insure it and stick some decent tyres on it.
Dispite what people say, they are not as unreliable as th