It's 20 years old and it's a Jeep. If you need something that you don't have to work on and still want it to be reliable I think you've answered your own question.
I bought my '93 Jeep in March for $5,000 - which is the going rate where I live for what I got. Since that time I have spent more time working on it than driving it. I have close to $10,000 in it now (thanks to the rearend locking up and causing major drivetrain damage) but I wouldn't get rid of it for anything. I love the fact that it's simple enough that I can work on it, I can usually find parts for it, and they are normally pretty cheap. Would I take off and go to Florida in it? - not a chance. But it's my Jeep and that's all there is to it.
The difference between me and you is that I'm 51, I have another vehicle to drive when the Jeep is feeling poorly. I'm on my own and not reliant on my parents for help with vehicles and the like so I make my own decisions. One day (hopefully you won't have to wait until you're 51) you will be in my position and you can do like me and keep your Jeep even when it makes absolutely no sense to do so. Until then, best to go with what Dad says and get something you have the means to operate. I'm pretty sure they'll still be making Jeeps when you have the means to afford one. If not, maybe I'll be dead and you can take a stab at buying mine from one of my grandkids. Good luck - study hard - do what's right.