In the scene where Charles Farmer asks the employee of Dunkin Dounts for advertising on his rocket, the shot shows Farmer in front of a large glass window in front of a graveyard with a short chain link fence around it. The shot of the employee is the inside of the real Dunkin Donuts in Santa Fe, New Mexico. The graveyard in the shot is a real graveyard with graves dating back to roughly 1910, and is behind the Dunkin Donuts.
During the filming in and around Santa Fe, New Mexico, Billy Bob Thornton did a "One stop promotion tour" as he put it, for both his album Hobo, and The Astronaut Farmer at the Santa Fe bookstore, Borders.
The premise is similar to Salvage 1, which was a short-lived TV series (starring Andy Griffith) in 1979 in which a small company builds a small commercial rocket for outer-space salvage of space hardware. Just like in that series, both rockets use Hydrazine for fuel.
In Armageddon, Billy Bob Thornton's character wanted to go into space but couldn't. Bruce Willis' character did go into space. In this movie, Billy Bob Thornton's character goes into space. Bruce Willis's character stays grounded.