The more education you get, the more money you make.
According to the US Department of Labor, people who do not earn a high school diploma make about $500 a week compared to college graduates who make about $1350 a week. People with college degrees will earn 270% more money than someone who does not have a high school diploma. For some context, average rent for one-bedroom apartment in San Diego County is about $1400 a month.
Thus, if you didn't earn a high school diploma, you will probably make about $500 a week which totals $2000 a month with $1400 going into rent. You'll have $600 left to spend on everything else: food, clothing, phone, car payments/insurance, gasoline, internet, and perhaps fun things like going out on weekends (if there's anything left).
This might also explain why over one-third (over 33%) of all American households are living paycheck to paycheck every month with nothing left over for savings or emergencies. Without the ability to save for the future and for unexpected emergencies such as injuries or losing a job, many households are at risk of losing homes and livelihoods as job markets continue to change and shift in the future. As such, earning higher levels of education is one clear way towards a more secure financial future for yourself.
So study hard - it will be worth it.