Ive had two ferrets. They can run from $100 to $150. You can train them to use a litter box but its not as easy as one would think. If you get one make sure you train it early and inforce the rules as if you dont it will be craping any where it pleases. They eat ferret food and they are nice but they smell. I would give them a bath atleast once a week if not 2. Use babyshampoo when you wash them cause they like it better.