I guess the list could be extensive, but I have a hunch that the overall ownership costs vs. real time using the yacht does most owners in. Sure, there are health issues, re-locating, down turn in disposable income but it seems from what I have been reading, that the coin counter on a yacht never stops spinning whether in use or not. That is the one big issue that won't leave me alone. Our plan to spend 6 months a year aboard our yacht will end up being much more expensive that we realize. After the first two years, we are goning no crew, self maintained, using mechanics when needed and eating spam....just kidding. Are we close to the issue, or way off?