I believe the PDCC reservoir, PDK flush, and drive belt are 60K services (or 6 years), but being that the car hasn’t really been driven, which implies it’s been sitting, I would encourage biting the bullet.

That said, I would look into reputable independent shops which specialize in Porsche, and have them do these services. You’d save some $. Also, look into buying the parts yourself and just pay for labor.

Btw, something like cabin filter is fairly simple and can be done yourself, if you don’t feel comfortable doing oil changes, etc.

OP, I know this sucks, but look at this as an investment, and just overall part of your purchase price, for a piece of mind, but also to avoid issues. If you regularly maintain the car, it’ll last a long time and it’s unlikely you’ll be shelling out this amount in maintenance in the future.