Sounds like your parents have already warned you about the next 8-9 years of cleaning,buying food and bedding,handling daily,finding someone to do all this when you go away,want to go out with your mates etc etc etc....they live a long time mate so be very careful!!! Well done for seeking advice first though,maybe leave it for a bit and find someone who will let you borrow/look after their ferrets now and then.
Good luck Mooster.