I admit that I don't know how the red tape works for this billboard, at "one of the most important intersections downtown", but it might be a way to give local non-profits with the most need a free plug...maybe a generous donor or two could sponsor the billboard for a month for one of these non-profits, and then more donors for the next non-profit for the next month, etc.? Try and do some good, anyway, until that corner gets prettied up.