Want a video & a Cadillac for a song video

This is a one time job to help out my son. He is on SSI due to a brain injury from a motorcycle accident. However he is a songwriter (with an "album" full of songs.) One of them is titled "Cadillac" and is about "losing everything you have but returning to it at a later date" We do have the song (produced on CD) that we are hoping to be able to use with the video. We R thinking if the video features a Cadillac, it might be relevant for the car company or something similar. Our budget isn't large, but we are open to discussions on how we can work together..