Noida Extension 2BHK: Hidden costs in project comparisons?

Noida Extension's 2BHK options around ₹80L-1.5Cr are confusing. I'm so fed up of renting, landlord raised rent again, finally taking the plunge. But comparing projects, it feels like every brochure hides a PLC or maintenance bombshell. Is anyone else facing these hidden charges when evaluating projects in Patwari or nearby? What was your experience?