Giving local business owners a voice at City Hall and fighting generational poverty were among the plans tech entrepreneur Beto Altamirano unveiled Saturday as he formally launched his bid to be the Alamo City’s next mayor. About 500 people, ranging from small-business owners to beer swilling hipsters, braved oppressive heat to hear Altamirano speak at Southtown’s Friendly Spot, where he laid out a utopian vision for San Antonio, which he described as a “forward-looking, historic city.” The charismatic Altamirano promised a glimpse of a San Antonio with less violent crime, more good-paying jobs, improved government transparency and better regional economic cooperation.