The only kind of boat I would even consider having a gas engine in, is a smaller (under 26') recreational, light weight, low use boat that is used on a lake or river; basically an open bow ski boat with an I/O. The resale and safety factor alone make the extra money of the diesel worth it in my opinion. When/if you ever sell the boat, you will more than get your money out of the extra initial cost of the diesel engine, you will save money in fuel expenses the entire time you own the boat, a diesel engine like a 5.9 Cummins will last way longer than a little gasser and have twice the power, and you will enjoy your boating experience more knowing your diesel fuel isn't a bomb waiting to explode. With the high cost of a new DE boat, why in the name of common sense would you try to save at most $10-15k on the heart of your boat? It's an interesting article, but he is exxagerating some of his arguments to make the gasser look more appealing (in my opinion).