I think studying abroad is a wonderful opportunity you should take advantage of if it doesn't put you behind in your classes. I wish I could do it, but that's one of the down sides of being a science major. If you're worried about the money, I say put aside a good deal of the money you make over the summer so when the time comes to confront your parents, you can at least offer to share in the payment. That shows maturity, responsibility, and also shows how much thought you've put into your decision.