I can always sleep in my rain jacket,” my husband Peter announced.Vacationing in rental homes is usually a bit of an adventure. We don’t need luxurious digs, and instead look for apartments offering a hefty discount if we stay for a full month.We did this three years ago in Pamplona, Spain. The apartment required climbing six flights of stairs, but it had a great view of the city—because we were right in the center of it. Only at night did this become a problem, as we discovered that the residents of Pamplona didn’t have dinner until 9 o’clock and really ...