Your Palomino was a decent camper when it was new. But that was 25 years ago!
The fact that the camper is still around says that it can't have been all that bad. But no one here knows what kind of life it lived, how well it was maintained, how many times it changed ownership, if it was used off road and in what kind of weather, how it was stored all the years... If you bought a 25 year old car, the questions would be the same, and you would usually base your decision on the current state of the vehicle, and not on some decade-old sales brochure pictures.
I have seen two of these old Popup campers being rebuilt. For the people who did it, it was a great learning experience. Economically, it was probably not worth it.
Parts can be found or rebuilt, nothing really complicated there. And the internet is here to help.
Only you know if your time is worth it, or if you would rather go camping.
Two things, though: it is always much worse than it looks initially, and it takes much longer to fix than you think it does. But it is fun and you end up with "your" camper that you know inside out.
