My brother is being dodgy and ungrateful for a free trip he can go on?

We are considering taking a family cruise to Alaska. My brother is aware I will pay for him since he always complains about not having money for things and now he says things like he’s thinking about it. He has nothing better to do and even says he has plenty of vacation days. I’m doing you a big favor and this is the way you’re behaving? Either say you want to go or don’t go. This is ridiculous.
My brother is being dodgy and ungrateful for a free trip he can go on?
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