There are lots of listings in that Category. The Yellow pages or the internet will have that info.
I once drove a car (using “Cars to California”) from Detroit to San Francisco, but had to pay for my own gas.I made a holiday out of it and took the full 7 days allowed to reach my destination. The car was a Buick Riviera, very cushy and powerful.
The way back was through L.A. and Arizona, Texas, New Mexico, etc., I bought a Greyhound ticket and enjoyed the scenery from my seat in the bus. Stopped off at Flagstaff Arizona and visited a school buddy. Greyhound lets you do that.
You may find the bus rather cramped, but I would fly back since you have already seen the scenery. Unless you want to take an entirely different route back.