A mockup of the proposed Ellinikon Development along the Athenian shoreline. Credit: Betoota44/Creative Commons Attribution-Share Alike 4.0 InternationalLamda Development, the firm that is responsible for the gargantuan redevelopment of the old Ellinikon Airport, will pay its first down payment for the project next week.The Greek state will be the beneficiary of the downpayment, which will…