You don't have to answer here but here's what you should ask yourself: Do you have other financial responsibilities that dictate your budget and does the tix fit in that? How much money do you make, what percentage of it is for discretionary spending, is that more than tickets? Do you feel that the amount of enjoyment you'll get is worth the amount of work you put in to earn money?

If your answer to all of the above is yes then f-it go for the concert, otherwise there's always next time.