When Lennox heard he might lose his chance at bigger fortunes and riches if he chose Adrienne, he didn't think twice and chose his wife. He knew that true love and happiness were worth more than any material wealth this world could offer him. Still, Lennox wanted to give his wife and future children a comfortable life and provide for their needs. He couldn't possibly rely on Adrienne and the Zhao family to provide for his needs.
The monk never mentioned the wealth he accumulated in the past, though he warned him that forsaking Adrienne to pursue fame and wealth would lead to a life of emptiness and regret. This was why he intended to step down once the project was completed.
He went home and found Adrienne still deeply asleep. However, her complexion had gotten better since the monk intervened. He knew that he had made the right decision to seek the monk's help, and he no longer doubted Adrienne's recovery.