Medical Education in Mexico

Since 5 years ago I wanted to become a surgeon i have wanted to become a surgeon for the past five years, nevertheless However, I'm afraid of it because I will have to work and study at the same time to afford my education, I'm 23 yo years old, I have already studied chemical engineering but I do not like it, . in On the other hand I know i can do those two things, but is quite difficult to find a part time job, I have had the chance twice to study medicine at IPN in Mexico city, but it is very difficult for me to make a decision. I need money to help my family, I feel kind of sad for about this situation. 7 Seven years again in the school and all that effort to get a bad paid an underpaying job?

I need inspiration, help ....

I need help in making a  decision.