The homes boast dream lists of amenities—a library with a nineteenth-century rolling ladder, an outdoor shower on a rooftop terrace, a modern art collection that includes Picasso—and all for less than $20,000 per house. The kicker? Residents must be no more than six inches tall.In 2022, Houston-based interior designer Alexandra Killion wanted to grow her skills and give back to her hometown. It was at the onset of the cottagecore movement, and she discovered a woman on Instagram turning a pink Barbie Dreamhouse into a chic abode. That gave Killion an idea: She could recruit a handful of peers to transform dollhouses into micro design showcases and auction them off for charity. But even though she was a seasoned designer, the renovation was harder than…