NRI investor: Noida Extension hidden costs and value?

Budget finalised, loan pre-approved for an investment in Noida Extension, but I'm based in Dubai so can't do a site inspection myself. Planning for a 2BHK around Sector 86. Builders like E3 Infratech dikha rahe hain properties, but I'm worried about the real all-in cost. Property price ke alawa stamp duty, registration, PLC, parking, yeh sab kitna add karte hain? And are there any specific price correction zones around Knowledge Park jahan abhi bhi value mil sakti hai? Brokers ke figures sometimes confuse karte hain. Kya hidden charges baad mein aate hain?