More changes are coming to downtown South Miami. Edgewater Capital Investments just entered the development business with a $1.8 million purchase of vacant land at 7435 Southwest 61st Avenue, where the firm is planning to build a mixed-use project. Manny Mato, a principal at Edgewater Capital, said the firm wants to develop a four-story building that will be equipped with apartments, office space and retail on its ground floor. Prior to the purchase, Edgewater Capital…