Need Help With A Wedding Dress

I am getting married in July 2006, and I have picked out a beautiful dress, that I cannot afford. See we did things a little backwards, and had 4 little boys. We started our family before the marriage, so now we are planning a wedding with next to no money. I really like Bonny Bridal style #508, it is my DREAM dress. But I cannot afford it, if you have any ideas, please let me know. My other problem is, I am not an average size, I am plus size...