I would take the scholarship.

I'm sure somebody could do a cost analysis that says delaying a year would cost you XX dollars over the course of the rest of your career, but on the other hand, you could forgo the scholarship, go to a regional, and hit the majors in the next few years just in time to get hired right before a merger or buyout and find yourself unemployed again with no seniority anyhow.

A scholarship to study in Australia or New Zealand is money in the bank when it comes to life experience, don't pass it up if you can get it.

Good luck.