(Photo: Dražen Sokčević) For many opera houses, the idea of staging Richard Strauss’ “Elektra” sends bean-counters in the Finance Department into spasms of Klytämnestra-like apoplexy. Their concern is not the need for five expensive A-list “Don Carlos” soloists or the cost of a colossal “Boris Godunov” chorus, but the logistics of enlisting 111 musicians to play 120 instruments. The financially astute composer {…}