This is pretty crass (and a wee bit cynical), but also pretty funny:
This is why so many couples skip the big wedding and instead spend their money on a fun-filled honeymoon and a down payment on a house. They fly off to a tropical island, for example, get a marriage license and contact someone like me to marry them privately and intimately on a beach or some other beautiful natural surroundings, fifteen minutes and they're hitched, then it's honeymoon time as soon as the sun sets on their wedding day. They can have a few photos to remember the moment and share them with a backyard barbecue later at home with family and friends. All for a fraction of the cost.
I like your thinking.
Married my son for free. Got ordained by American Marriage Ministries online. Secular wedding. It was about them not a god or the church.