Your family inherited the property two years ago. That means only three years remain until they can sell it. If you are male, do your required military service now. When you finish your service time, it will be very close to the time when your family can sell the property, and you will have the money for your education. Lots of Korean students come to study in the US after finishing their military service, so you don’t have to worry about being “too old” for college.