I Want A Pet Monkey…?

lol I know this sounds crazy, but its legal to own cappuchin monkeys and I want one!
so primate owners can you answer these questions?
how much does one cost?
what do they eat?
how do you bath them? (do they make monkey shampoo! lol)
do they get agressive when reaching adulthood?
do they adapt well to other animals in the house?
thanks!<3