I learn, when about 8 years old. Not all wood boats float. Long story not for now.
The first time I ever heard of Ferro Cement I was shocked! How the heck can a cement boat float?
Well, true, we know Buoyancy in the design of any material used for boats we can make float.
I really not know a lot about Ferro Cement. I asked a man one day who knows a lot about boats. I said; "What is Ferro Cement in boats?"
He said; "It is concrete with a metal reinforcing that rusts away over time and falls apart".
Well that was all I wanted to learn about Ferro Cement.
I not going to say it not a good boat building material because as I stated in my short education of this, you see what I learned and I stop there going no further. The boat in the pictures looks nice enough and it looks to still be floating after 30 years.
If the price is right for you and it what you want? Here how I do with these type boats. I buy them with the mind set that one day I will strip/rob the parts I want; Lead Keel, Engine, Winches etc. I can use that stuff on other boats I build or fix up. The rest of the boat I take to the land fill (Garbage Dump).
Here my example; I am considering buying a 24 foot (About 7.3 meters) Bayliner Buccaneer. I not hear a lot of excited talk of these boats and their production line is not something of a Record Breaker.
The Outboard 4 Stroke engine is well worth the price of the boat. So, "IF" I buy this boat I buy for the engine and have some fun experimenting with some ideas I not want to try on an expensive boat.
After a year or two; I will take my engine and give the boat to some Teenagers around here. If, no one wants the boat? I have already talked with the State and know where to Dispose of it legally.
I hope this helps. This is my perspective on this and what I do when I buy something I may not be able to sell.