Try to get a second opinion on the repair of your car, like we should also have a second opinion when the doctor tells us we need an operation.
Lord have your perfect will be done int his person's life, and the situation they are facing with their finances. Help them also find a mechanic that will do a good job in the car repairs for less money. Give them your peace and the strength they need when hard times comes their way. I pray in the mighty name of Jesus Christ. Amen!