I want you to make your own sign first out of a big $1-$5 piece of white posterboard and go out there by the road with it first to make sure you're comfortable standing at a busy intersection with a sign. It's not as easy job as it seems.
The sign costs $120 shipped so I want to make sure you're comfortable with the noxious fumes of exhaust in the air and chicken trucks going by you with liquid shit rolling out of them.