So many questions:
How far from being complete is the boat?
What is the situation with the person that originally ordered the boat? They are probably trying to get their hands on it too and the builder
might be doing a "sharp one" by selling it to you.
Can you get the boat removed from their premises without any legal
liens on it?
It is not unknown for builders (not only boat builders) that are in financial poo to take short-cuts. Be very wary.
Lots of Ocean Spirits were built. I am sure you will find a second hand one somewhere in the world that comes without complications.
By the way, it will cost you a lot more to complete yourself than it will if a boat builder
completes it, simply because you won't get the trade
discounts on materials.