I like the full walk areund deck and one level front to back.
I own a Diesel Duck 462 hull #5 and we burn 1.6 gallons per hour at 6.5 knots and 1500 RPM. That is close to a liter per mile and we can carry 7,500 liters of fuel.
I'm new to the forum but we have spent the last 7 years aboard Dora Mac and we're now in London, UK
... We have found that our Diesel Duck has always been well received when we pull into a marina.
mydoramac.com
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The CPP solves the problem. Controllable Pitch Propeller, not as expensive as you might imagine.
Which gear mfg are you referring to? I've priced the prop/shaft/tranny combos before and they were minimum 20k for a small boat.