I'm not sure what offends me more: demanding thousands of dollars from her guests, or that she scheduled her wedding on the opening Saturday of football season.
This would have been my response to her:
Dear Miss Priss
Congratulations on getting married, but I send my regrets that I will not be able to attend your wedding due to several factors which preclude my attendance at your nuptials. My good upbringing and being taught manners by my mother and father preclude me from stating my proper feelings about your approach to having people pay you for the honor of attending your "Wedding Party". I was taught that if you have nothing else to say then always say "Why Bless Your Heart"
Good Luck and I hope your wedding plans are not met with the same fate as the Roman Empire was so many years ago.