How to convince someone that won't listen?

Okay. My family has been having lots of trouble with where we live. First of all, my little brother who is diagnosed with autism cannot receive any help in the town we currently live in because there aren't any good programs here for that. In addition, I hate where I live. I feel as if I do not belong here at all and wish I could live somewhere else. My mom cannot find jobs in this location, doesn't feel comfortable at all (just like me), and worries so much about my brother. My sister is okay. Sometimes she likes it here, and sometimes she doesn't. Luckily, we found this specific place in which has excellent autism programs, good places in which my mom can get a job she would be interested in, and most of all, a place in which we feel very safe and happy there. We have been there, and we felt that it was a perfect match for us. However, my dad says that he didn't like the place, it will separate my brother, sister, mom, and myself away from him, and that it is a bit too far away form him (about 3.5 hours). He says that I will have to adapt to this place on my own until I leave off to college and he thinks that we can find good autism programs out of nowhere here while none are good. Our only best choice, however, for saving my brother, mother, sister, and myself is to move to that specific town. In addition, my mom, sister, and I feel very depressed because we are not happy with this place at all. Everyday I cry because I feel so uncomfortable and alienated here. My little brother has gotten much worse overtime (he even has AD HD now). Yet my dad will not let us move to that town that will help us a lot! I understand that it will be difficult to live 3 and a half hours away from him, but it is honestly for our own good. My sister in addition is going to a school here that has very poor averages. In the new town, the school there that we decided to put my sister in has very high averages (as a matter of fact, it is one of the best school districts in the country!) However, my dad wants to still keep her here and says that she should still continue to try her best and receive good grades (and she isn't even benefiting from this school. My mom has a good opportunity there to get a good job and she cannot find one here. I get the chance to go to one of the best universities in the world if I go there, but my dad doesn't want me to. How is everything going to work out and run smoothly for my sister, brother, mother, and I if we are still stuck here because my dad will not let us go? How can I convince him to let us go there? He says that we can make use of our problems here, but they are not working out at all!! Thank you. I don't want him to get upset with separating the family, but the 4 of us have a great opportunity there while heis best one is here.