I have had two Discoverys, one went 345 thousand on the original engine. Quirky, but awesme off road. LR3 is more complex, I'd go witha late Disco 1, or a Disco II with an upgraded 4.6 in it. They can be had dirt cheal and can be worked on by anyone. Stay away from the dealers or repair and service. Massive tech info at
www.discoweb.org. Also have had several early series vehicles, primitive and not worth the trouble for what you are doing. Late model, I like the RR Sport.