I will pass read the listing and it is far from being the way JMB had it. It says that there are 4 baths that are 'rough in' dont know what that means but i picture the worst. Have to agree with Johnny C the front porch should have been kept original.
From the listing "The home boasts 8 bedrooms and currently has 2 full baths and 2 half baths with 3 more full baths roughed in"
Roughed in means that the basics are there from an infrastructure (piping, etc) standpoint such that the room could be a bathroom. As in, I have a roughed in bathroom in my basement. There are drains in place and water piping leading to the area.
"Beneath what was the original front porch of the home is a room that John would use to test fire his guns..." How many folks can say they have an indoor range that John Moses Browning used . Of course its not there anymore, but still very cool.