Owing at least partly to the fact that he was once homeless, Luke Einsel is a scrappy businessman, with a high tolerance for risk and a nose for a profitable niche. Over the last decade, he built an Overland Park smoothie stand into Smart Beverage, a 15-employee company that supplies schools, hospitals and other large institutions with healthy drinks. Along the way, Smart Beverage acquired several competitors, purchased every single 7-Eleven slushie machine in Mexico, and raised several million dollars from investors. In 2019, Kansas City officials lured Einsel’s Kansas-based company across the state line with tax incentives, paving the way for it to move into an 18,000-square-foot warehouse at the former Richards-Gebaur Air Force Base. All that promise and optimism seems like a distant memory these days. Einsel is winding the company down, he told The Star, his eyes sunken and his hair and beard grown long one afternoon earlier this spring.