I actually thought when I first looked in this morning, the bill board was attached to Georges car, and when he came out, and got in his car, he would be taking the bill board along with him- that was not the case as the bill board is not even attached to his vehicle!
i looked this morning on kidfinders web site and it explains that the moving billboard is to help until other media becomes involved, and it states "usually within a month". I take this to mean they loan the bill board out for a month until there is a media interest, and obviously this case has a huge media interest.