As suggested by Monogear, here are what I'm attempting to do, in no particular order. (I don't normally talk about myself, but here goes.)
A friend gave me an empty hull, (which started this). I vowed never to get into boats, or locos, but..... I was totally happy with my steam engines, boilers, etc., some made by yours truly, Traction Engines and the like. But, noooo, along came this pesky boat and upset all of that. (And a loco, by and by.)
If I live long enough, I plan to do the following.
Make the hull into an open launch, as I have several very nice boilers and steam engines, (more arriving periodically), so why not display them? It's 850mm long by 30 wide. (Note all the Nautical terms?)

I have an Imara on the way too. I'll do more when all the bits are amassed.

I have built from a kit, a Griffon Hovercraft, just a toy really, but quacked into another too, an SRN5. I can't remember why. They are way over priced, and the instructions are way worse than bad, but, I got there in the end.

I have a Creole Queen Riverboat in the air on it's way to me, so that's another to work on while I have nothing to do.

I found an old "Speed Boat" that I had forgotten I had. As I got it for a Chrissy Pressy as a kid, it's over 60 years old now. It looks pretty tired, but, I've started to restore it. It used to be powered by a Frog 150 deisel engine, but that's almost a crime to own one now. (It still goes like a bought one.) Unfortunately, I'll be using electricity. None of my boilers are small enough, but, if that works well, I'll make a little boiler and stuff that goes with it.

I have a smattering of engines small enough for the job.
I'll try to attach some photos of the last one, to show you how the ravages of time, and the non understanding of a very small boy, can take their toll.
If I can't manage it, I'll try again tomorrow or Sunday.
Cheers.
Neil.