My wife and I took a week-long honeymoon to Montana and Wyoming several years ago to visit parks and go hiking. That's not everybody's thing, but it's one of our favorite activities.

We kept our spending very modest. We used airline and hotel points for about half the costs to reduce our out-of-pocket spending. But even if we paid everything out of pocket (air, hotels, car, gas) it would've come to about $1500.

Part of our choice to keep the costs modest was that we value saving over spending. We could have "pulled out the stops" and spent 10x or more what we did. It wouldn't have meant going into debt but it would have meant spending a big chunk of our savings. That just didn't seem prudent to either of us. Why blow our savings now when we can let it grow for another 30+ years to help fund an enjoyable life after retirement.

It's all relative to one's portfolio, of course. Two of my friends got married a few months ago. They spent upwards of $100k on a lavishly catered wedding and a honeymoon of hop-scotching around the South Pacific in business class and five-star hotels. Is that imprudent? No. Their net worth is several million. They made reasonable choices in light of their priorities and their means. I wish them only the best.