Re: can I afford to continue sailing
"Stand your ground" is not the approach I'd take. I wouldn't give in, either, but don't approach this as a confrontation- a good wife is hard to find and divorces are more expensive than dock fees. Discuss it.
You are both right. It's impossible to justify sailing from an economic standpoint. It's an expensive thing to do. However, if you spend your life worrying only about money and not enjoying what you're doing, it's wasted.
Convince her that you are mindful of what it costs and you try to economize as much as you can, but sailing is too important to you to give up and the two of you need to find a way to make it happen.
Maybe if she gives up new clothes for 6 months?
1977 C&C 30 Mk 1 hailing from Port Clinton, Ohio