Translation of validez

This is almost six hours, a long time for someone who has children and a day job. I recommend that we write eachother shorter emails and in both languages. Spanish and English next to eachother.
The place I have been to is famous for its many language schools. People come from all over the world to learn Spanish and practise their language skills. I guess there are more than two hundred schools there.
Usually we were not that picky, but we intended to stay in Buenos Aires for almost 10 days. On the first day we walked around the city center and did some shopping in the Florida passage.