For example, these are from AVSIM Commercial FSX Aircraft Review's* description of the Cessna Skymaster. And, again, the first one is my favorite. The last is my second favorite.
It has two of everything to maintain and replace, increasing operating and ownership costs. But, of course, it has two engines and that second engine just might save your life one day. Owners usually agree the extra cost is well worth it within minutes of an engine failure at a critical time.
My favorite Skymaster quote is from a pilot who had an engine failure in IFR** over the mountains at night. ATC asked, "Sir, are you declaring an emergency?" The Skymaster pilot replied, "No, I'm declaring an inconvenience."