Who's going to pay to move and store the O2 canisters until next season? What about the food? I don't know much, but I don't think logistics work there, like they do places more convenient. (I assume we're only using O2 as an example, as I'm sure there's tons more things). Also, there's tons of other work that's been done, like the expense of the rope and the ladders that have already been installed on the mtn for climbing season. I imagine that most of the money is already spent by the time people arrive at basecamp, and that the nominal money they could salvage isn't worth the effort after planning a big expedition.