How do you figure it will be cheaper and faster for you? If you have taken any of the prerequisites courses as a HS student, it’s likely you will be expected to take higher level courses as an undergrad college student.
If you plan to graduate early from undergrad say at age 20…and plan to apply to medical school then, this will not be an advantage. Younger applicants to medical school are actually at a disadvantage. @WayOutWestMom