Actually, Rhino does not work for the internals of a scale model where the parts will be cut on a CNC machine or a laser. Rhino is great for real boats, and real blueprints but there is a level of fabrication detail that is not possible with Rhino (that I know of) and that is the translation from the CAD file to the CNC file.
I use Solidworks for all my internal parts. Yes, I do agree Solidworks is very cumbersome, and imprecise, to do reverse-engineer organic shapes, but it is the best program to use if you are going to "take apart" a model and create a file for CNC or laser-cutting.
Here is a model I did lately. It's a 1:24 scale half-hull of the 1928 yacht Cambria. The hull alone is made in Rhino. Then you can see the internal parts added, and, finally, there is a screen-shot of part of the laser-cutting layout. It sure would be fun if I could do this whole thing in Rhino, but I doubt it.
And I added a picture of the laser-cut parts.
Finally, this is the second model I have done for this client. Although I don't have a picture of Cambria completed, I did include a picture of the 1:16 scale Reliance half hull I did for him previously.