All wranglers are built tough. Just make sure you get it thoroughly inspected before buying it. Manual tranny is bullet-proof. Very stress free car. Like djarred said, not the most comfortable like saloon cars but the benefits far outweigh the cons. 20-30 k is not much at all. You will get used to it very quickly. I do 240k daily round trip between doha and Ras Laffan. Parts are expensive, but it rarely breaks down. If you have never owned a jeep before, i would strongly suggest you read the owners manual thoroughly + ask advice from other jeepers. We are a small but very helpful community.
Apart from company, there is one more garage in industrial area that specializes in Wranglers. A bit pricey but they do a fantastic job.

Again, don't hesitate asking fellow jeepers for any advice.

Hope this helps.