Adani Tatva aur Anant Raj mein total cost of ownership kitni hogi?

Since January I've been shortlisting flats in Sohna. Dekh raha hoon Adani Tatva Estates aur Anant Raj The Estate Floors mein. Adani toh under-construction hai, Anant Raj ready hai. My main concern is ki advertised price per sqft aur actual jo pay karna padta hai, usme kitna fark hota hai? Matlab, total cost of ownership kya rehti hai? Stamp duty, PLC, interiors sab milaake. Also, investor ratio kaisa hai in projects mein? Ghost society ka risk toh nahi hoga na? From my experience, ye hidden costs and investor numbers bahut matter karte hain.