Sunrise-based nonprofit Elderly Housing Developing & Operations Corp. acquired a senior living tower on Miami's Brickell Avenue, keeping the property out of the hands of developers. There's no doubt many condo builders would love to get their hands on the 3.2-acre site along Biscayne Bay, but it's being maintained for affordable senior housing. Stanley Axlrod UTD Towers, an affiliate of United Teachers of Dade, sold the 269-bed tower for $14 million to 1809 Brickell LP, an affiliate of EHDOC.…