Re: Repair of broken hull around keel stub
It looks like a writeoff to me. Unless that boat has enormous sentimental value, get another boat. An old C&C 24 is worth less than the materials needed to fix that damage, never mind any labour (of which there will be LOTS).
Strip it of all useful gear for resale and scrap it.
I, myself, personally intend to continue being outspoken and opinionated, intolerant of all fanatics, fools and ignoramuses, deeply suspicious of all those who have "found the answer" and on my bad days, downright rude.