But there are savings over time in getting rid of the buses. The problem boils down to finding a transportation solution that a) they're willing to shell out $xxx millions of dollars up-front, thereby eliminating the buses and saving $y millions of dollars a year in fuel, driver and insurance costs. The sticking factor becomes how many years of saving $y does it take to equal the $xxx outlay? And at what length will the people in charge decide that yes, that is now a good investment.
It's similar to a private high school in my area that built a large wind turbine. Sure, it was a few million dollars to build (minus some state and federal grant money), but their electricity is now "free". In 8 or 9 years they'll have saved the equivalent electricity cost to equal the construction price of the turbine. After that, the electricity truly will be free (until the end of the turbine's life, when it'll have to be replaced in 25-30 years, but at lower cost than initial construction, at which point the pay-then-save-until-break-even cycle begins again).
Then there's Disney's corporate partners. Siemens has a transportation division that includes light rail. I'd bet that somewhere in their R&D department they've also explored PRT systems. What if Siemens footed the bill for part of it, and then used WDW as a testing ground and real-world demonstration of their technology? (Can anyone say original EPCOT?)
-Rob