NEW YORK CITY — A joint venture between Witkoff Group, Maefield Development, Infinity Urban Century and New Valley LLC has completed the $430 million acquisition of a development site at 701 Seventh Ave. in Times Square. The companies plan to build a 340,000-square-foot multi-use complex that will include retail, a hotel and the nation's largest single LED screen. The $800 million project is expected to be operational within two years and fully complete in three years. Starwood Capital is providing $475 million in combined acquisition and construction financing for the project. An existing 11-story office building at the site will be partially demolished to make way for the complex.