Sector 82A buyers: Hidden costs ka kya scene hai?

Gurgaon builders ki hidden charges se main pak chuka hoon. I'm upgrading from my 2BHK, eyeing 3BHKs in Sector 82A, maybe a Signature Global project. But jab final price dekho, it's always way more than initial quotes. They quote one price, then add PLC, IFMS, OC, maintenance advance, sab kuch. My budget is around ₹2.5 Cr, par in hidden costs se it shoots up. Any residents in Sector 82A? How much are you actually paying for maintenance? And were there unexpected charges after possession? Yaar, I need to plan this better, it's frustrating.