Complex sentence: The project normally starts after the club win one's national league (which qualify their winner to compete in the following year's Copa Libertadores), and the clubs usually spend large sums of money to win the Copa Libertadores.
Split into simpler sentences: The project normally starts after the club win one's national league (which grants them the right to compete in the following year's Copa Libertadores). It is common for clubs to spend large sums of money to win the Copa Libertadores.