Maybe you've always dreamed of having a wedding where everyone you've ever known shows up to wish you well. Or maybe you're more of a quiet, please-don't-gawk-at-me type of bride. Once you have that engagement ring on your finger, you're going to have to decide whether you want the big wedding or a smaller affair, and that decision alone can be one of the biggest factors in deciding how much you're going to end up spending on the wedding.