"We recently bought a house in a mountain town where we’ve rented for 15 years. It’s the perfect location: within walking distance of trails in one direction, and the old downtown of this former mining town in the other. Since the COVID pandemic, this lazy town has become incredibly popular—and expensive. What our family of three could afford was a 100-year-old fixer-upper, 900 square feet, two bedrooms, one bathroom. Because our town is now hip, all our friends and family want to visit. And we want them to stay with us. Over the years we often stayed with my brother-in-law’s family. They have a big house, and they always offered us a guest room with its own bathroom. We loved it and were so grateful. When they came to visit, we gave them a room, but one of them slept on the living room couch. Six people used one toilet and shower. If they were our only guests, I might be more generous. But with all our company, it’s starting to feel like a hotel. So I’ve proposed to my partner that ...