We have a Lagoon
410 s2. The engine under the bunk is an issue with noise. We mostly run on one engine as do a lot of Lagoon owners. The fuel consumption
is about 3/4 gallon an hour doing 6 to 7 knots on one engine vs twice that doing 8 to 8.5 knots. If we motor
at night, we use the engine in the opposite hull
. As to the generator, we have a northern lights
in a enclosure with sound damping foam bulkhead between the generator and the cabin. There is some noise in the saloon
, but hardly any in the cabins except the forward ones.
As to our incessant whine, we don't bother since we know cats are better than mono hulls. hahaha!
All boats have their pluses and minuses. Cats are more expensive; don't do well upwind; are more problematic as to dock
space; and are easily overloaded thus losing their speed advantage.