From the A6 motorway:

Take the turning for Aurach, then go towards Leutershausen. Go towards Leutershausen and continue in the direction of Schillingsfürst. After 7km you will reach Neureuth. There, take the first left in the direction of Brunst/Schwand. Weihersmühle Estate is just beyond Schwand.

From the A7 motorway:

Take the turning for Wörnitz and go in the direction of Wörnitz. Take the first left in the direction of Schillingsfürst/Oberwörnitz. After Oberwörnitz, go right in the direction of Leutershausen. Stay on this road. You will go through Altengreut and then toward Neureuth. There turn right in the direction of Brunst/Schwand. The Weihersmühle estate is just beyond Schwand.