The idea is ok, but only if you are really sure that you can handle it. A sedan and a tractor with a trailer are completely different experiences. Especially over long distances. I think it’s better to find out how much to tow a car 500 miles and hire a pro. To understand the prices, everything depends on the route, type of car and urgency, but at least you do not risk your car and nerves. They have a convenient comparison of prices and conditions, you can choose for yourself.