Fan Casting The Never Ending Final Days of Walter Mingford

Walter Mingford is immortal. He has lived over 100,000 years. He is the last living being on earth. The world he lives in is dead, barren, a ghost like shell of what it used to be. He is delusional, living in his own fantasies where his family are all still kicking around with him in the barren waste land he sees as home. The movie is set to music, using it as a means of furthering the story. Walter is lonely, and no matter how hard he tries, he will keep living. How can a man live like this and stay sane?