I run a car repair shop and we get most of our business by word of mouth.
We're located a bit outside of town and don't get a lot of drive by traffic.
No. You will lose money.
If you spend money on effective advertising (and do it right), you'll make a killing and get back ten dollars for every dollar spent. Spend it on ineffective advertising (or do it wrong), however, and you'll quickly hemorrhage all your money and go bankrupt.
If you'd like to discuss your needs and create a plan that makes you a killing, call me.