I too would like to express my enthusiasm. Your friend's rock garden is par excellance.
However, I still have one small question... Does the enchanting Helichrysum sibthorpii stand outside all year round without protection from rain and snow? Or is it protected? I ask because I am thinking of integrating my two small specimens into the rock garden. This species seems to like a regular dose of water (?) At least the plants in my two pots look a bit sad when I come home on Fridays...after watering they recover very quickly though. So I suspect they are better off outdoors and should perhaps only be protected from too much wetness and snow in winter.
I would be grateful for any advice.
Cheers
Thomas