Selling monkeys

I want to enter the field of dealing in pet animals like cats and birds. Among the animals I want to deal in are chimpanzees which can be domesticated and trained for entertainment purposes, such as attracting customers to one’s store, or they may be sold to households simply for purposes of amusement. But they are very expensive. Some brothers – may Allaah reward them – have told me that dealing in monkeys is haraam, because they are a sign of Divine punishment and wrath, and because this involves changing their nature and mistreating them, in addition to the fact that they are a waste of money. What is the ruling on that?