It depends entirely on the price. At current prevailing prices, the resulting savings from owning at a 2042 are just so limited vs just renting. My spreadsheet indicates that even with the cheaper
points charts, most of those resorts result in more expensive per night cost than resorts like BLT, CCV, or SSR. If you want to stay at 2042s, the more financially sound play would be to buy one of those, and try to book at 7 months at the 2042s. If you want the purchase to "end" in 2042, then resell the contract then. It will still have ~15-20+ years left and thus plenty of value. You get the lower dues for the duration. Sure you won't be able to get the cheapest room types, busiest seasons of the year, etc. But you will probably still get to stay there regularly, and it's a decently large financial difference.