We finished! It looks fun. I think I'd like one of my own. Sophie is pleased and looking forward to sleeping in her new nook. Though tonight she's having a sleepover in the basement teaching studio with a friend (there's more room in there for a guest).
Ultimately I'd like Sophie to have the basement room for her own. I'm dreaming of a studio space, about the size of a school classroom, for the piano and for teaching, and for group classes and quartet rehearsals and solo recitals. With a small loft area at the back to put up guests. It will be made from strawbales or cordwood and will be set off in the woods with a view of the glacier in the distance.
I'll keep dreaming. In the meantime I'm thrilled that Sophie is happier with her bedroom arrangement.