Don't be like that. It may be new to you because you just discovered this fact, but your dad has been living this forever. This change you are trying to bring just means your crushing his dream... You are almost there... Keep focusing on school.... Read stuff and after you join campus... You should be a genius so that you can easily find job and even start your own start up. Beside without education there is literally nothing that will help you grow in this world. You can also do online business after you join campus as wifi will be available. So you can earn money as long as you are smart. That's what ur dad wants. Don't be a disapointment. If you help him now you will just all keep living without growth. But if you all sacrifice and live with the pain for a while then you can bring change later on. You have to change your sis mentality too. Be that girl. Don't make his effort be in vain. There r lots of options for you out there if you study 😊. I doono that's just my opinion tho