The Houthis forced the US to retreat as well so don’t sell the Houthis short. The Saudis have no strategic advantage over the Houthis but the Houthis can totally cripple Saudi by destroying refineries, ports, and desalination plants. The Houthis have mountains much like Iran and are tunneled into them. Saudis have no well defined targets against the Houthis. Saudi will lose this fight and their leadership shows the same misunderstanding as the Trump administration.