Builder payment plans are often misleading on total cost for investors.

I'm based in Dubai, eyeing a 3BHK in Dwarka, maybe Arya Group. Can't do site visits myself, so relying on community input. What's the real all-in cost for a ₹2.5Cr property? Beyond stamp duty and PLC, what hidden charges appear near possession? Also, for an NRI investor, is a construction-linked plan smarter than a down payment for better terms, or does it just hide costs? Need clarity on total acquisition cost.