I had to work for a year to get my hedgie. I know you've asked a year ago but it differs with different people. My mom hates all animals and only ever let me have a fish. For me, the real turning point was when my friend who also owns a hedgehog went on vacation and let me take care of her hedgehog. This let my parents see what it was really like to own a hedgehog. Really, the best advice I can give is patience. They know you're responsible now you just have to let them know you are committed. I just kept telling facts so they knew I was still interested and so that they knew more things about why they are amazing pets. If you really want one, it won't matter how long it takes. Trust me, I know it feels horrible when they just keep saying no but the reward is well worth the wait.