Not to sink your ship lol (pun intended) But I hope this is ok with you.
I went and completed a basic version utilising the existing ship hull.
Yours still looks FAR more intensive, however I have fitted this out to be a sunken monument with furniture and rooms, with the furniture piling up to the back end of the ship within each room to appear as if it has moved when the ship has gone down.
It is currently complete and I have a few testing it and its puzzles currently, so I will release it given it tests successfully.