Wife getting kids excited about a vacation we can’t afford

As the title says, my wife is getting our kids excited for a Disneyland vacation we can’t afford. She got to go to when she was young, but she had wealthy parents. We aren’t and won’t be in a position to go for a long time. My wife is telling them we can just save money for a couple years and go. There’s no way that’s the case because we need to save money for a few years to pay off debt. My daughter talks about the trip frequently. My wife doesn’t think she’s doing anything wrong. I think it’s a very bad thing to do and we’ve been arguing about it. I’ve tried researching the situation and can’t find anything to say if I’m out of line or she is. Thoughts?