Cost of Living near Royal City Area , Hanoi in 2500+ USD

With all nice amenities, upper middle to high social class,
what should be the monthly budget for living in this area in Hanoi.

please suggest as need to take decision fast.
Cost of Indian foods ? Maids ? cooks etc etc if you could help me out with details ,
it would be great.

https://alphahousing.vn/project/royal-city/