I think they will revisit the inn when they eventually get the song and/or tame the Uta-chan
Chie have three massive advertising machines in her harem, her bestie can do renovation on her own in half the price and probably faster too, they did it before, surely Chie won't become too stupid, maybe, I hope
Wouldn't it be more efficient to just ask another Song composer? Sure Utatane is popular and all but there are other writers as well. (I get its to make the story funny, but I still wanted to point that out)