Would Like Info On How Our Wedding Can Be Sponsored

We are planning a Sweetest Day Wedding on Oct 21st. My fiance & I have been together for 10 years and have been celebrating our anniverary on this date. We would like a big wedding but the costs are to great. I have been hearing about sponsored weddings, & have no idea where to begin. This may be a far fetched idea but right im trying to look at any & all options. If anyone has an idea on how to go about this please email me