My investment journey: payment plans are a puzzle

I've been tracking Hyderabad property for years, honestly, the payment plan options still confuse me. Considering a 3BHK in Gachibowli, around ₹1.8 Cr. Construction-linked plan lena smarter hai ya initial down payment zyada karke discount lena? From my experience, ye total acquisition cost aur final ROI mein bohot farak daalta hai. Also, Salarpuria Sattva jaise builders ke PLC aur floor-rise premium worth it hain for investment? Kya payment terms mein flexibility milti hai? Seeking opinions on maximizing ROI.