I am more than happy to present to you Omega type jacht that I did some time ago.
This type of jacht was developed by Juliusz Sieradzki in 1942. Is still very popular, especially for regattas or traveling purposes (yeah you can make a tent with the horisontal part of the mast spar afaik).

The model that you can see is not perfect copy of Omega that you might seen on the lake one day, but it keeps most important aspects of it.
By this I mean that:
- lenght, width, height,
- general shape of boat,
- areas of sails,
- dimensions of mast,
- shape of drop keel,
are as on Omega.

And yes, its free, just put me in credits in your awesome work!

The model is separated in parts, for texturing purposes. For best use, I recommend to just attach textures in blender, (names will allow for automatic Principled BSDF setup), and after this just join model to one piece.

Here is some render that I did: