Well, lets consider the plight of businessmen in their commercial ventures according to Marshall, "who bears the penalty of any error in his judgment; and who, if his judgment is approved by events, benefits the community as well as himself. Let him be considering whether to erect dwelling houses, or warehouses, or factories, or shops." (297) He must estimate the costs and he must anticipate what price he may be able to charge. "He brings this estimate of cost into relation with the estimate of the price he is likely to get for any given building together with its site. If he can find no case in which the demand price exceeds his outlays by enough to yield him a good profit, with some margin against risks, he may remain idle." (298)
This matches the mood of the musical well, because it is a symbol of their homeland, but it is also something that you find on the Alps, and the von Trapps are about to travel over the Alps (in case you know nothing about The Sound of Music, it is about an Austrian Captain who is a widower with seven kids – he is depressed over the death of his wife, but slowly, due to the children’s peppy new governess, he learns to love music and life again – but all of this takes place against the backdrop of the Nazi rise to power, so the newly happy – and newly re-married to the governess, Maria – von Trapp escapes with his family over the Alps).