I own a pc 433 and last trip in Jan 17 was 125 gallons for 9 days, 184 NM and generator 8 - 10 hours a day. 3.38 for Diesel. I cruise 12-14 KTs, usually on autopilot, and can cover some ground. Point and go.

I have rented in the past the 474 and the PC51 and based on an average BVI trip and reasonable usage of the generator and moderate cruise speeds you can figure between 10- 15 gallons per day. Fuel prices have been from high 5.00 to as low as 2.75 so best to focus on gallons. The generator will surprise you at how much it burns. .5 to .75 GPH. Boat engines are not bad if you take it easy. New Yanmars are really nice and quiet.