Rawat Construction Lal Bagh: What's the true cost beyond the quote?

Rawat Construction ka Lal Bagh project mein hidden charges ka scene kuch alag hi lag raha hai. I work in real estate but buying my own 2BHK is a different ball game. They quoted me around ₹1.8 Cr, but I'm worried about the true all-in cost. Kya kisi ne recently Rawat se liya hai? What about those 'possession charges' that only show up later? Construction-linked payment plan better hai ya down payment option? Super area vs carpet area mein bhi confusion hai. Koi real-world experience share karega?