Found on Superyacht Design this concept of floating offshore paradise with its own go kart circuit nammed "The streets of Monaco" and designed by Yacht Island Design and BMT Yachts.
I let you read the complete presentation of this concept on the Superyacht Design website. Just to summarize in one sentence : "The Streets of Monaco" is really a Yacht for only 16 guests and 70 crews, a copy of section of Monaco built on a stable Swath platform and powered by diesel electric drives.
Like it or not (I don't), the project seems serious since BMT is the technical design partner. I wonder who in the world would buy such a yacht, not so much for the price but for the taste !!