Conversation so far:
Was Cary Grant involved with business?
Stirling refers to Grant as "one of the shrewdest businessmen ever to operate in Hollywood.
What was one of his first business endeavors?
In the 1940s, Grant and Barbara Hutton invested heavily in real estate development in Acapulco.
Did that do well?
CANNOTANSWER.

Question: What other business ventures did he pursue?
Self-contained rewrite: What other business ventures did Cary Grant pursue other than the real estate development ?