Complex sentence: Initially, Rob Zombie was to be one of the artists participating on the tour, but due to the high production costs each Rob Zombie concert would cost $125,000 in bandfees and show production alone.
Split into simpler sentences: Initially, Rob Zombie was to be one of the artists participating on the tour, due to the high production costs. Each Rob Zombie concert would cost $125,000 in bandfees and show production alone.