He looked into several areas, including the Louisiana area. But, the FL land made the most sense because it was the center of the state, an area where all interstates could meet. At the time, Ocala was suppose to be the big central Florida city, but obviously due to Disney, Orlando now is. Also, the land was so cheap in Orlando and he could buy the land with out raising a bunch of eyes.
He actually almost didn't make it to Orlando, they had complications with the planes. I can't remember the exact story, I would have to look it up in my text books which I don't feel like doing!
I took an upper-level FL history course and learned a ton about Disney and Florida, pretty cool!