Bengaluru property: True cost for overseas investors.

Spent the whole Sunday checking out Lodha projects online, especially near HBR Layout. I'm based in Dubai, so ground reality is tough to gauge. What are the actual hidden charges beyond the quoted price? Stamp duty, registration ke alawa, possession pe aur kya costs aate hain? Also, construction-linked payment plans versus higher down payment for an investor – which is smarter for leverage? POA se manage karna kitna practical hai?