It is difficult to tell from the photos how badly the deck and cabin were damaged. Classic plastic boats can be repaired with ... more plastic.
Even if you did not have insurance in place I would think that who ever owns the land that tree was on would be liable for damages; it could be the boat yard or some other party.
If you did not have the boat surveyed before you should consider bringing in a surveyor at this point to at least get an estimate on the repairs needed and to find out if would be 'totaled' by an insurance co. A surveyor would also likely know trades people who could do the repairs if you are not up to it.
What boat yard is that anyway?
"The cure for anything is salt water~ sweat, tears, or the sea." ~Isak Denesen
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