Complex sentence: It was his vision that made the club leave Ayresome Park for an all new seater stadium in 1995 the Riverside Stadium and making money available for the purchase of big-name players.
Split into simpler sentences: It was his vision that saw the club leave Ayresome Park in 1995 for the Riverside Stadium, a brand new all-seater ground. He also money available for the purchase of big-name players.