Sure there are. But you can overdo it, or outlive it.

The Bay Area's finest example of outliving it is Filoli. It's a estate off 280 near 92. More than one square mile, in Silicon Valley. At the end, it was occupied by one woman in her 90s, along with a large staff.

(It's now open to the public. There are tours and a cafe. The house is big, but not monumental, like San Simeon. Mostly the place is gardens and pastures.)