Making driving license as cheap as possible / other federal state?

Howdy Biker, and that’s what I’m playing with the idea of making my motorcycle driver’s license (A2) this summer. Since the rags here in BaWü (Baden-Baden) are comparatively expensive, I’m currently looking for ways to buy it cheaper. What can you advise me about? In another federal state (bspw Berlin) it’s hard to get away from the law. How far can I get away from my residence to make the ticket, does someone know about it? Where in BaWü is it cheaper? I am currently living in Australia and in fact I no longer have a residence in Germany (but could move back to my parents after that). However, it looks like I am going to move to Brussels. Are there other options legally? Look forward to your answers Evan