Ridiculous level of monetary expectations aside, if her friends and family were unwilling to help out this dingbat should have seen it as a sign that this was not meant to be. Resistance meant they thought it was a bad idea in general. Show weddings are all ego anyway, mostly on the part of the bride. If they really loved one another, a justice of the peace would have sufficed.
If entitled idiots would concentrate half as much on their marriage as they do the wedding, their would be no divorces.