They are built like the proverbially named brick s==t house. They have a huge flat bottom
keel, made out of polyester and glass with
steel punchings poored in the mix. They are called encapsulated. That is what I bought when I retired. Mine was a small one, 30 ft long. It only drew 3 ft. I hit the bottom all over the
Bahamas, and
Belize and Guat. and some of
Mexico. You could have a small dance party in the
salon. One night we had a birthday party for a couple of well-liked cruisers and there were 14 people on board for about 6 hours. It was built in 78 and had its original
diesel.
Yanmar 20. always started, never a bit of trouble except for the
learning curve it gave me. I loved it and would buy another. in a minute. Mac