If they are already not interested in driving, I'd definitely get their input in what they'd like. From reading about your kids before, it may be more "grunge" than this.
I would self-PPI this after learning what the common issues are. Not worth spending an hour shop time. If you run into an issue, just sell it off for what you paid.
Mine are starting to drive soon. I don't have a good plan yet. My older one wants a vette. Right!
G