You can print your own R/C racing yacht and have it on the water in a week.
Green Hornet is a Footy Class sailboat that can be used for fun in your swimming pool or as a highly competitive race boat for international competition. You can find information about the Footy Class at http://footy.rcsailing.net/
Print files are provided for the complete hull, fin, and rudder. You may need to resize the fin and rudder before printing. I recommend that the fin be 45mm wide and 200mm long. The rudder should be 35mm wide and 150mm long.
Complete instructions for assembling your Footy are at https://3dprintedradioyachts.com/ where you will also find much useful information on printing 3D boats from Footy size to IOM.
I design my boats using FreeShip, an open source CAD program developed specifically for boat design. I export a completed boat to a .igs file that my friend Selwyn Holland prepares for printing using Simplify.