Complex sentence: The No.1 course was designed by Alistair MacKenzie, better known for designing the Augusta National and with significant private investment and upgrade of facilities, the course would be considered one of the best in the world due to its excellent design.
Split into simpler sentences: The No.1 course was designed by Alistair MacKenzie, better known for designing the Augusta National. Golf professionals have speculated that with much private investment, the course could be considered one of the best in the world due to its excellent design.