Complex sentence: Bharathiraja initially hesitated to direct the film but eventually did so on Rajkannu's insistence and being given an advance of (US $57 in 1977) for directing the film.
Split into simpler sentences: Bharathiraja initially hesitated to direct the film but eventually did so on Rajkannu's insistence. Bharathiraja was paid an advance of (US $57 in 1977) for directing the film.