The Horse's Mouth (1958)

Gulley Jimson is broke, difficult, conniving, uncouth, and a welcher, but an artist. The visions in his head may not really satisfy him when realized, but the quest continues, for the perfect wall. The Beeders leave for six weeks of vacation, and return to find a seven thousand pound committment, and the wall of their living room a national treasure, even though living with a wall mural of feet is not their cup of tea. Then, in a bombed out church scheduled for demolition, THE wall that can become his vision.