As others have said you could do this in many places - including countries that are generally more expensive like Germany (350-450€ for a small flat in Leipzig)

As others have said you could do this in many places - including countries that are generally more expensive like Germany (350-450€ for a small flat in Leipzig). In practice the main challenge might be finding a short-term rental for as low as people staying a year or more, so factor that in to your search.