My wedding in 1969 cost about $150. I had bought my dress and veil in Vienna for practically nothing a couple of years earlier. I had a lovely wedding in the church (no charge) and a punch-and-cake reception in the Fellowship Hall (no charge for the hall, church already had tables, chairs, tablecloths. Mom made the bridesmaid dresses, practically nothing. Flowers ran about $75. Cake was $35. Punch was very little. Church had candelabras, kneeling bench, etc. Candles weren't much. Marriage lasted 38 years.
My daughter just had to have a big wedding. I had barely paid off the wedding before she got divorced (and I paid for the divorce, to boot....)
My granddaughter had a lovely back-yard wedding, described by her as "Hey, we're having a BBQ and, by the way, we're getting married, too!" I flew up a couple of months early and dragged her to a wedding dress store as I was determined she was going to wear a wedding dress. Luckily, she's a size 3, so it was easy to snag a lovely simple and elegant one off the samples rack for $130. Couldn't get her in a veil, though. She made all the decorations (and they were lovely). A friend married them, another got them a great deal on the food (and was the grillmaster at the reception), another friend had a son who was just getting started in wedding photography and videography, so they got that for free. They bought the marquee tents for the backyard from Amazon and then turned around and sold them again for more than they paid for them, thus by-passing the cost of tent rental. A pretty white gazebo from Home Depot, decorated by the bride with flowers and hanging candles served as the alter and now shelters their picnic table. Tables and chairs were borrowed from their church. Table cloths, plates, cups and utensils were disposable. The bridesmaids all wore blue dresses, whatever they had or wanted, as long as it was dark blue. The guys wore navy blue pants and grey shirts with navy blue ties. The wedding cake and cupcakes came from Costco. The bouquets were made by the bride. Music was recorded. Lots of beer and wine, sodas and iced tea, and a few bottles of hard stuff discretely kept out of sight from the boozers. Altogether a beautiful wedding that cost less than $1500. I won't be around at their 50th wedding anniversary party, but I'm pretty sure it'll happen and that it will be in their backyard.
I don't know the figures of correlation between the cost of a wedding and the "survivability" of a marriage, but I'll bet the strain of starting out a relationship with a huge debt has to be a problem.
That said, it's no skin off my teeth what kind of wedding people have, as long as I don't have to pay for it...…..