I had a steel hull and deck built which I fitted out.Fairly inexpensive way to get afloat but the hull. And deck are only 25% of the whole thing still if non yacht type materials used in interior fit out and. A keen eye kept on boat jumbles a proper seaworthy boat can be got float.Fertan was an initial error and so where built in tanks.Interior treated with car underbody stuff that worked and interior rust was not a problem.Decide what standard you want to achieve the less yacht finish the cheaper and quicker.Sold the boat and it’s still going 30 yeRs on.