The music director of North Carolina’s Charlotte Symphony announced his departure recently, citing exhaustion and the intense pressure of dealing with the orchestra’s “financial situation” as factors in his decision. So what will it take to put the orchestra on firm fiscal ground? A lot of things, as it turns out. The endowment must be built up, more tickets must be sold, and most importantly, a city with little to no history of high-end cultural philanthropy needs to discover one, and fast.