Parag,
Generally if you set things up correctly, you should get results pretty quickly - anywhere between 1 day to a month at the latest. It depends on what school of feng shui you follow, if you change your home around or not. Some schools, it's a one time deal - the Black Hat school - other schools , you make minor changes every year - the Flying Star school, for example, but basically you keep things where they are, unless you're having problems. I would definitely try to get a recommendation for someone in your area - from someone who has gotten results, and see what happens. Rachel