Honestly, you're 21 years old, already responsible for a wife an three (!) kids, and not educated. Do you REALLY think it's a sound financial investment for yourself or your family?
Also, rethink your timeline. You're much much better off saving until you can fund the entirety of your course in one go, to minimize downtime and out-of-currency expenses, and to make your CV stronger.
Have you thought about doing this as a hobby only? No shame in it ..