When Solstice Harris heard from a friend of a friend about an available 270-square-foot studio apartment in Utah’s capital, she jumped. The 24-year-old filmmaker said she had long wanted to move to downtown Salt Lake City — among the safer places in the state, she said, for someone who is LGBTQ. And after an extended search for somewhere — well, anywhere — in the city’s tight residential markets that was affordable on her budget, Harris said, “I didn’t have much choice but to take it.” She lives alone in a windowless basement studio near South Temple and 800 East, one of three living quarters located inside an office building. Her…