I think therefore I am tortured.
The realities of having a rollercoaster in the house would be a nightmare; all the maintenance, security, city permits (of which there would be a plethora for safety, zoning, expansion, etc.) not to mention that riding the same ride would get old.
Kramer’s character, as I heard Michael Richards describe him, isn’t dumb or crazy, he’s actually one level above everyone. Unconcerned with what others think, the world is his playground.