I made this inboard electric boat at very low cost based on e-bay purchases. The boat hull is from a small centerboard sailboat (these go for next to nothing if the mast is broken or the sails are bad), with 24 VDC 3/4 HP motor drive.
Built the boat to travel around with a steamboat group, while building a new steamer. Now that the steamboat is completed, I will probably sell the ecectric. It has served us well for 5 years noe, runs about 4 hours at high speed, much longer at low speed.