How much can you make self employed tow trucking?

That depends...in areas that have a lot of snow it is seasonal but substantial. I live in the Outer Banks, NC and there is a four wheel drive beach where tourists don't let their tire pressure down or they try with another type of SUV ect and end up hung up...here it is a very lucrative business. If you can find a place where people repeatedly need towed then you can make a lot of money.