Wohnung for 5 People

I am an Indonesian Student that will have an Internship program from early March until late August 2014. I will have my internship in Herne, Germany and needed a Wohnung for 5 persons.

We are looking for a Wohnung that is:
1. Furnished with beds, kitchen, bathroom, internet and TV, heater and/or air conditioner etc. and ideal for 5 persons.

2. At least 5 minutes away from the nearest public transportation and near by to grocery store or places where we can shop for foods and living needs.

3. We are looking for a Wohnung with total cost under £1000.