Question about the town-village and Brenners

So after Grieder saved Luzi, he said for the Brenners to meet him at their farm at sunrise the next day.
I am a little confused about what was where.
I think the brothers did not wait at their farm. Instead, they went to Grieder's cabin and tried to sneak up on him before the scheduled sunrise fight at the farm. Is that right?
So where was this cabin? It seemed far away from where Luzi and her mother lived, so how did the Brenners find it?
Also, when Grieder first saved Luzi, don't you think the Brenners would have been furious and would have immediately gone to Liza/Mother's house and burned it down or attacked or at least tried to re-kidnap Luzi?
I guess I'm not understanding what exactly happened from the time Grieder rescued Luzi to the time the Brenners came for him.