From 2BHK to villa — my upgrade cost worries

Okay, I'll be honest — I'm upgrading from my Baner 2BHK to a 3BHK/villa, maybe near Kiwale. Triaa Landmark ke projects dekhe. Advertised price se 'all-in' cost kitna upar jaata hai with stamp duty, PLC, parking? Hidden charges kya hain jo possession pe aate hain? Pre-launch deals investors ke liye worth it hain ya bas hype?