As noted in the old threads, some Camano 31s have been fitted with generators. I used to own a Mainship Pilot 34 that had the NexGen 3.5kW, one of the smallest marine diesel engine generators.
The generator with sound shield costs about $8,000. Professional installation, another $2-3K.
Realize that this generator is permanently installed with sea water cooling like the propulsion engine. Honda, Yamaha, etc air cooled generators cannot be used below deck, only on the bow or swim platform.
David