Which is why, when my boat got completely stripped out and I thought, might as well have the Yanmar facelifted while it is out....I loaded it onto a trailer and took it over to our local friendly diesel mechanic and not a marine place. He set it up on a bench and ran cooling hoses to it. did a full bench rebuild...$450, thank you very much!
Quote from the yacht mechanics was around $3500, plus extras, and they would probably not be able to even look at it for two months because they were busy.
Think of it as a tax levied on the foolish and those lacking initiative and cunning.