Hi Reza,

Where do you start in Germany? I live in Bayreuth (near Nürnberg) and I can offer you a place to stay for 1 or 2 nights. As I am dutch I might be able to find other hosts for you in the Netherlands, too.

If you want to travel cheap in europe you might consider using hospitality networks. This way you get to know the local people and have a great (and cheap) time, too :-) I have a list of them on my website:
http://itchy-wheels.exploder.org

Cycle the world (using hospitality clubs),
Marc