Miami-based developer Mast Capital has acquired the 2.8-acre vacant development site addressed as 1420 South Miami Avenue for $103 million from Rega Center Miami Holdings. The site is located on the southern edge of the Brickell Central Business District and represents one of the last remaining raw parcels of land available zoned for rapid transit-oriented high-density development in the area. The developer submitted site plans for a massive master-planned project yielding 2.6 million square feet across three soaring towers, including an 80-story luxury condominium tower with 400 residences, and two multifamily towers of 50 and 60 stories with a combined total of 850 luxury apartments. Mast Capital partnered with private equity real estate firm Rockpoint for the acquisition, the third joint venture between the two firms this year.