The optimal jib stick length happens to be exactly equal to the length of a broomstick, or so says my wallet. A broomstick is dirt cheap compared to any other piece of wood and it is nicely grained (strong). Add two SS hook from a hardware or bathroom supply shop and bend one straight. (Cut off the excess length if any). Add a little varnish and there you are, a perfect jib stick for less then five quid.