Personally, I think you are too worry about having the 2042 end date. To me, it better to get the later end dates, as than you "should" have some value left in the contract to resale, instead of having $zero value at 2042. Sure, the MF dues ends at 2042, but when you sell the later end date DVC contracts, the MF dues also end after completion of the sale. Price it low enough, and it will go like hotcakes. To me, it's not much work, you just pay the broker a commission, and they do most of the work, you just sign paperwork.
I rather have some sort of capital preservation left at 2042 (even if there are lots of arguments about what happens to value in the future). You might even luck out and get most your initial up-front "sunk" costs back, or maybe even profit! Maybe not, that's why assume "sunk" cost, but a 2042 DVC resort / contract is absolutely "sunk" costs in 2042, where for other longer end date resort(s), you might be pleasantly surprised at the residual value left in 2042.
Great3