I wouldn’t say that as a student of IIM Ahmedabad and also a resident of Ahmedabad, visits from your family members will be a problem. This is because the maximum duration of your day will be spent in classes, studying for exams or assignments. You will not even have the time to be disturbed by your family members. It’s not that big of a factor that might change your decision to go to IIM Calcutta or Bangalore rather than IIM Ahmedabad. Moreover chances are that you might face some health issues and it's to your advantage as an Ahmedabad resident that your family members will tend to you so that you can recover quickly.