Cdiesel is right on. Was just about to make the same point.
Doesn't matter if you're selling signs or coffee. If you're going to be successful you must have a valid business model, stick to it, and plan, plan, plan.
Doesn't surprise me a bit that some FS owner's haven't made signs. (as the OP states) H*ll, you can hire signmaking talent. Administrative talent is also required....very important.
To get ahead, and more importantly, stay ahead you need sound business practices. Continually review what you do, how you do it, and why you do it.