Developer Camilo Miguel Jr., CEO of Coconut Grove, Florida-based Mast Capital, has teamed up with private equity firm Rockpoint Group to acquire a 2.8-acre site in Miami's Brickell financial district where Mast plans to develop 1,250 residential units, including 400 units in an 80-story condominium tower. There, the developers plan to sell nearly $1 billion worth of residences.