Walt Disney had one that you could ride. Thousands of families have one in the back yard. And it’s a hobby that is growing every day. Google Directory shows 188 clubs in the United States. Many of these backyard fantasy railroads have some elements of Disney in them, but few go as far as to replicate the actual park. Andrew Anabu has done just that.
(also see Carolwood Society for more info on Walt’s love of trains and other model railroad enthusiasts)