Walked into a local store the other day and the windows and walls were plastered with hand lettered (scribbled) signs and brochures. Specials on this and that all written in magic marker on regular sheets of paper.
How professional is that? It doesn't take a large budget to use your computer to do a simple sign layout and print it in color on your printer. Scribbled, hand-written signs indicate to your customers that you do not operate your business in a professional manner.
It cost very little to actually employ a graphics designer to help you put together attractive brochures and sale posters.