Sector 22 Yamuna Expressway — what's the actual all-in cost?

Sector 22 Yamuna Expressway — I'm evaluating a 2BHK at Nimbus Realty, quoted around ₹78L. My analysis suggests factoring in 10-12% extra for stamp duty, registration, PLC, and parking. However, I've seen some projects where these easily push 15% of the base price. For a calculated ROI, which range is more realistic here in Noida Extension? What's the typical total acquisition cost you've experienced on recent buys?