Some finishing details...

[Sumpter250]

Me think that you doth have too much faith in me. But, I'll give it my best shot when I'm ready to giver a go!

Your skills are more than adequate for the task, the above photo shows that clearly.
You need a hull...could be a wood block cut to the shape of the hull.

The tug here has a squared off bow, and transom. Bending the above deck part ( Bulwarks ) may be touchy, but do-able.
The main deck enclosure is a basic rectangle, as is the pilot house,and a lot of the "maritime details" bitts, liferings, even windows and doors, are purchasable.
The Revell "Harbor Tug" kit hull is 8-3/4" long ( 63'-6" in HO ), and is the kit I modified to build this:
   
I cut the hull off at the waterline. The pilot house on this is scratch built with styrene sheet and strip.
If you were to do the same hull, cut at the waterline, glue in the deck, glue the hull and deck assembly to a thin sheet of styrene, (to lock the shape in), you could then do the bow and transom "surgery"/ rebuild, and scratch from there up.

If nothing else, just give it some thought. Where there is a will, there is a greedy relativ--- :oops: ---, a way!
Oh, the ladder, midships, attached to the side of the superstructure? That's a caboose ladder from an Athearn kit, re-formed as seen. There's one on the Starboard side also.