There are ways to make Worldcons less expensive and to make them have more "buzz" in the sense of making them much more crowded. Because Worldcons jumped up a size quanta, we are now too small for the pieces of convention centers we're obliged to rent. Part of this is because we really don't want to have to turn people away from the most-popular events. We could get away from that. If we were willing to accept, for instance, that not every member who wants to attend the Hugo Awards or the Masquerade will be guaranteed a seat, and if we were willing to accept a much higher level of crowding than I think most members would enjoy, we could make Worldcons more affordable by shoehorning too-large events into too-small-but-cheaper space. That's the gist of what I said in my latest reply to
this discussion, in reply to George R.R. Martin's contention that Worldcons could easily fit back into cheap hotel space.