Hearts of the West (1975)

Naive Iowa farm boy Lewis Tater dreams of being a famous Western novelist like his hero Zane Grey He leaves home to answer a writing correspondence courses ad for oncampus classes only to discover that the school consists of a row of postboxes at an isolated Nevada train depot On the run from the con men responsible Lewis stumbles across real cowboyscowboy actors shooting a movie in the desert The wouldbe writer soon finds himself instead acting in Westerns for the rundown Tumbleweed Productions studio in Depressionera Hollywood