Not sure what the goal was when this mold/boat was built, but I am sure there was a lot of time/money put into it for only one boat.
Humm..... I know, etiquette suggests that one should not restart old threads but what the he!! Not a believer that it is a Hydrodyne by the general design compared to the original post, but would be curious if it has roots to the brand. Not in the market for a houseboat but a HD 20 Trailer is the reason I came across this. http://boats.iboats.com/1971-hydrodyne-boats-43-houseboat/1861697.html