Very interesting web site. Having had the pleasure of taking the “Walk In Walt’s Footsteps” tour at Disneyland, I can speak about two of the listed items. As indicated on the site there is indeed a basketball court inside Matterhorn Mountain. The reason that it’s there is because at the time that Matterhorn Mountain was constructed, Anaheim building code required it! Apparently a building the height of the mountain could only be constructed for office space, living space or sporting or theater exhibitions. So, to comply with the Anaheim building code, Walt had a basketball court constructed inside the mountain.
The other item is the unconfirmed idea that the Disney Studio had to be built so that it could be converted into a hospital to obtain financing. This is actually partly true. The Studio was actually built with the money that was made from Snow White, financiering wasn’t needed. However, times were tough and one hit doesn’t make a successful company. So Roy had an idea. What if they built the studio so that it could be converted into a hospital, thinking that if the company failed, they would have an easier time selling the building as a hospital than as a studio. If I remember correctly this story is also told on the Disneyland Disney Treasures DVD collection (in the tin can) that came out in 2001.