I'm not sold on the feasibility of flipping what will be 50 or 60 year old structures and selling them as new timeshares. Construction technology, building codes and Green Energy codes are moving at lightning speed, especially in the last 10 years. The practicality of upgrading a structure built with 20th century materials and methodologies to then-current merchantable standards may be a bigger challenge than one might think.
Consumers will have heightened expectations regarding the accommodations as well. Just look at all of the criticisms of current Disney resort rooms regarding something as basic today as USB ports and WiFi access. Now imagine a reality where new hospitality product on the market has fully integrated smart technology, including thermal controls, self-dimming windows, MEP systems (mechanical, electrical, plumbing), and advanced interior and exterior soft goods and furnishings. Let's not even start with what structural issues they would face if they decided to "gut" a building, requiring it to be brought up to current structural engineering, mechanical engineering, and life-safety standards.