If you want to be successful in business, you've got to learn the idea of investing for returns. 2 weeks' living expenses in exchange for the opportunity to learn from people who've made anywhere between "a very respectable living for one person" to "millions a year" seems worth it to me.
You can listen to their stories. You can walk up to them. You can ask them questions. Do you really think that you're not going to see 250 euros of value for that ticket?
The question of whether to go to a conference, or spend money on a professional designer, or hire an assistant, or outsource some copywriting, or a lawyer... they are all the same question at heart.
To run a successful business, you absolutely have to pay for things. End of story. You cannot do it all yourself. If you need to pay for something, and you don't have the money, you figure out how to earn more so you can pay for the thing and free yourself to earn even more money after that.
Look, I don't care whether you personally come, I'm not making a profit and - more importantly - there are people lining up for that ticket from Denmark, France, Italy, and even Serbia.
I just want you to question your assumptions so that you have a chance of succeeding.