Target Audience: Where do they live?

Remember i figured out that my target audience was 18 - 25 year old male/female Nurses, teachers, doctors and students.
Where do they live? what kind of houses do they live in? do they live in the towns/cities or villages?
I have used a website called Acorn to help me research demographic details about my target audience. http://www.caci.co.uk/acorn/

Doctors:

Doctors and teachers have quite a large income, so they would probably live in a reasonably big house or apartment. Doctors need to live near where they practise, so either a town or city.


Teachers:

Teachers could live in cities, towns or villages, wherever there school is.


Nurses


Students:
Its hard to pinpoint the demographic details of students because they have such low incomes, however any students between 18 - 25 would be living in student accommodation near their university, so that brings it down to towns and cities.