Coincidently, I just got a letter in the mail saying that, per Florida law,
DVC conducted a structural inspection of my home resort and validated that the current maintenance fees are properly amortizing for the long term repairs.
It will be fun when the cabins have their inspections come due, but in the meantime, you have to assume that their (high) maintenance fees are amortizing for the long term repair costs (i.e. ripping the old cabins out and completely replacing them). The owners wouldn't eventually be left cabinless; they paid into the replacement cabins over the course of decades.