Help Finding Good Road Tripping Car

So for over a year I have been looking for an f250 4x4 7.3l powerstroke extended cab, either obs or early 2000s... but with my small area I could almost never find em and when I could they'd be ridiculously priced. Been wanting to pack everything up and road trip in a slide in truck camper so I had settled on the idea of that truck... But with the major increases in cost of diesel and gas and the scarce findings, I have been debating on changing my plans to more of a sedan or suv and towing a smallish trailer (with small little bathroom and kitchen still). But I am not exactly sure then what alternatives to look for. Like, would swappin from an f250 7.3l powerstroke and a slide in camper set up to a sedan or suv with a small trailer even be much more affordable? I just need some help figuring things out. Would still prefer a bit of an older car like 90s to early 2000s for a variety of reasons (less computers, typically better build quality with more metal and less plastic, more preferred aesthetics, etc.). I have a budget around $15k (with a bit of wiggle room depending on quality and condition of car). For the truck I was looking for anything under 200k miles but for the car option I'd prefer something close to or under 100k miles on it.

Some cars I was looking include the 90s 2000s Jeep Grand Cherokee, Toyota 4Runner and Toyota Land Cruiser and Toyota RAV4, and Ford Explorer.

Please just give me any advice. I just wanna be able to travel with some mild comfort of a simple trailer or slide in camper and do some mild off roading and not be entirely destroyed in fuel economy if possible or worried about notorious performance issues or mechanical issues.

Posting this here again as I got very few answers last time, most left me with more questions lol.