Problem, it will only work indoors.
Back when we did this I picked up a bunch off of Craigslist and local Retail Fixture supply houses.
As for them being outdoors, my customers always moved them in at night.
You charge $70 to change the direction of an arrow on a sign. WOW!
FireSprint. I clicked on his link at the bottom of his post. And he charges $70 to change the direction of an arrow. That's to click one button on the computer it cost the customer $70. That's a little steep.