If you are into the collared commercial look, I think this one looks like a huge bargain. I have no idea how hard it would be to transport it to where you live from England, but it's small enough that I bet it wouldn't be too bad. If you could find the right team, I bet you could rebuild the cabin on this one to make it better for pleasure boating, and get everything else in good repair and still be about 1/4-1/3 of the cost of building it new. I think the Yanmar, with the ultrajet is a cool power combination. I recently met a guy that had a similar sized boat that he had custom made about 20 years ago that had a Cummins and Hamilton jet. He loved it, it got surprisingly good economy, and it had been trouble free for 20 years.
Finished in 2022 with 70 hrs on the engine.