Questions about Grand Cherokee

Hi guys, I want to buy a Grand Cherokee, which is supposed to be my first off-road car. Up to now I only drove coupes and convertibles, now I decided to buy a off-road car. I like the Grand Cheroe the most. Should be Built:from 94 and definitely the 5.2 V8. I drive about 25,000 km a year (70% highway, 20% highway and 10% city traffic). And once a year I have a stake of 3,000Km NON STOP that I have to drive and return. It is clear to me that I can already imagine that the Grand Cherokee swallows every kind of fuel. What does the Jeep wirklicj consume? I’m not a heater or raser, drive mostly calmly. Sometimes I want to have my spaas too, is already clear to me that it comes to its 20L/100 km. And what do I have to do with a car that is more comfortable with a cross-country car than with a coupe. If I buy a jeep like that? Most of the ones I looked at have driven over 200,000Km, but can’t imagine that a 5.2 V8 engine at 200,000Km is broken. What do you say about it? What are the most vulnerable repairs? (costs?) Which features should I pay attention to? What should I pay for e.g. a Bj.: 95-97 ? Jetz already many thanks for EURE help! MFG Driven Köln