Hi Esha - given you have two kids travelling along with you , I would suggest that you book a standard suite or a one bedroom suite.
Should cost you approx 10-12k per night . You can book via Make my trip or Booking.com.
Are you looking for aqua homes? You can start by visiting Vedic Village. Look for Aqua Homes. Almost every house has a caretaker, you can have a talk with them. One may also come across few agents outside Vedic(in nearby food shops) who do the booking as they have been asked by respective owners to do the same. These people will generally charge you slightly higher and would be less accommodative. They won't even let you have talked with owners putting up some or other vague reason. Anyway, your task would be done.
Good Luck!!