Translation of six hundred in Spanish

I guess you know Spanish very well. I'm not on line most of the time. I think to get accommodation in the city is hard. I have many friends in Madrid, they all live outside the city. I think we can help each other to practice German or Spanish.
I wish you would help me to improve my Spanish. I am studying law in Germany and I am trying to learn Spanish. I hope you can help me and I could help you to learn German. Have a great day.
Sorry that I did not write earlier. I have got a lot of work in my office. I did not forget and always think about writing you. What exactly do you study? Do you have children? Are you married?