I dance lindy hop, and I don’t travel nearly as much for dance events any more, but I know a lot of people who spend pretty much all of their vacation time on dance events. There are some things that can make it easier — a lot of Lindy events set up housing with locals, for instance — but it’s not a particularly cheap hobby.
On the other side of the coin, I also hear a lot from people who question the price of an event ticket. I help organize an annual event weekend here, and the last month leading up to the event is usually spent panicking about whether we’re going to break even or not. And if there’s a deficit, it comes out of our personal accounts, which is never fun. Overall though it’s worth it for all of the wonderful friendships I’ve made over the years.