While it sounds like a good idea, my advice is figure out how much you can realistically make.
If it is less than what you currently make, then stick to your job.
If you can pull off doing your job in the day and the tow truck thing at night, then do that until you've got yourself up on your feet.
Also, know that there is probably competition in the area already, and they won't be too keen on new blood.
|