These campers are not rocket science - they can be repaired with a little TLC and ingenuity. There are many threads on the topic out there. All you need is a dry space where you can work on such a project and some time - actually a lot of time, as they all turn out to be much more work than anticipated. In that case you need to decide if you would rather travel or rebuild during that time. Only you can make that decision.
But maybe you are lucky and it is in decent shape - if it is still around; an internet search brought up an ad that had already been pulled.
If it has been sitting under the roof for some time, it will likely be dry by now. That doesn't mean it won't leak like a sieve once out in the elements again. But resealing is among the normal maintenance activities anyway.
Wishing you and your family many happy travels! With this camper, or another one!