Finally taking the plunge: My Bangalore property cost worries

Finally taking the plunge into Bangalore real estate feels like a huge commitment after years of renting. I'm eyeing a 2BHK around Reliaable Lifestyle Layout, maybe a Geown Properties project, with a budget around 1.2 Cr. My biggest worry is the *real* all-in cost. Beyond the base price and stamp duty, what about PLC, parking, and those interior fit-out charges? Should I expect a massive jump from the initial quote? Also, for a first-time buyer, is a construction-linked payment plan smarter than a larger down payment? Does paying more upfront actually get you better terms or a spot discount? Any insights on how much these extras truly add up in Bangalore?