I doubt it would sell at just 20,000 the auction is still going on.
It is a tugboat, not a tipical tug , underpowered , but servicable.
In a busy harbor there are a lot of small loads that need to be shuttled about on scows and barges .
It could serve as a tug on smaller ships , you would need the full size for the big ones.
In truth it is the need for maintenience is what kills most businesses of this type , and this boat is already old , the owner needs to be a diesel expert and a good sailor , the crew will spend a lot of time scraping and painting .
I am only daydreaming , I don't have nearly the funds to risk.
In a few years Sanannah will be improved , if the project is successfull the ship traffic wil increase a lot and business for harborpilot and tugs will be great.