Once you've decided that you want to become a Marquis, you naturally need an impressive old stately home to live in to impress your new Royal chums.
So, you build yourself a haunted-house-a-like Neo-Gothic pile on the hill overlooking the town to remind everyone how important you are. This was a bit of a nouveau riche attempt to buy some class with its over-the-top Gothic austerity, but it was interesting to see how the other half lived in the 19th century.