Develop a Plan
God provides every family with sufficient resources for the next generation. If you plan early and share this plan lovingly with your family, you should be able to gain the support of your family members.
You can discuss with your family about your plan for the future. This plan should include the course you plan to study, the budget for your course, and the job you plan to take when you finish the course.
I want to suggest to parents that unless you have some special reasons, the family's resources should be shared equally among them.
I know of a family with three sons. The eldest son wanted to study overseas but was told that his family could not afford the expenses. However, the second and third sons were allowed to study in another country. This arrangement has caused a rift between members of the family. It is now almost 20 years; the parents are old and sickly, but the eldest son is still angry and continues to believe that his parents had been unkind and unjust to him.
Every member of the family should know that his parents have lovingly prepared for his future. But you should also be realistic and resourceful yourself. Be willing to sacrifice your own comfort, use a smaller budget, and work to find some of your own resources. This will win you the support and respect from your family members. The sum of money you need from your parents should be estimated and laid on the table so that it is transparent. Then a plan should be developed to try to obtain this sum.