Gurgaon payment plans: investor's dilemma?

Two years ago I'd have laughed at these prices in Gurgaon. Fed up of renting, finally buying a 3BHK in Sector 83. I'm looking at an AS Estate project near Dwarka Expressway. Builders are pushing construction-linked payment plans hard right now. Honestly not sure if this is better for an investor than a down payment plan. Is there any real room to negotiate the payment schedule? Or are these plans just designed to tie up capital with no benefit? What's the smarter move to minimize total cost of acquisition?