I made the sign about 3' high and the width of my trailer so I could see over it and the resistance wouldnt be much more than the equipment and the tray up front. I drilled holes every inch on a piece of angle iron and then cut out six pieces and welded them to the ramp for brackets. I made the backing myself for ridgidity so the total price was $300. I could get the same thing on aluminum for less than $200. I put the ramp up when working so it is a billboard when people drive by. I kept it simple, cause everyone assumes I do lawn stuff and I don't feel a need for an infinite list. I made it EYE catching and the Phone # readable from over 2 blocks away.