Andrés needs my school-run minibus repaired to get back to work in Ciudad de México

I make my living with my school-run minibus. 6 weeks ago the rear axle failed, and the mechanic says the repair will cost $550. Without the vehicle I earn nothing. I have been borrowing from friends to pay rent, and now I have run out of people to ask. I support my two daughters and my mother. Before the breakdown I worked twelve hours a day, six days a week. I have been offered extra shifts for the next three months if I can just get the vehicle working. I have a written estimate from a certified mechanic and will upload it here. All money will go toward the parts and labor on the estimate, with a small amount for road tax and insurance renewal. Where the $550 goes: • rear axle replacement (parts): $380 • Road tax and insurance renewal: $55 • Labor charges: $115 Ask me anything below before you decide. I'd rather you were sure. - Andrés