car repair needs/parents with toddler

Hello. My son, his wife and 1 year old on live in Phoenix and it is very hot there. Their vehicle is broken down and they are having to take baby with them on the bus. the bus is not so bad, but the walking to the bus stop and waiting in the heat is not good at all. Temperatures are soon to hit 110 plus for the rest of the summer into the fall.

They have bills as does everyone else, and barely make ends meet. they do not have funds set aside for car repair. I have helped but still a long way to go to meet the repair cost. 

Any help would be appreciated. 

Thank you