All US banks are federally insured, meaning that the stolen $50,000 would have been replaced, and Walters would not have been able to use it absence as an excuse to foreclose on the ranches.
Although four men break out of prison, stock footage of five riders is used for the getaway sequence.
In various scene inside the mine different characters walk past, bump into or knock over 55 gallon ribbed steel drums. The first patents for those types of drums were not issued until 1905. The movie is supposed to occur in the old west. For steel drums of that type to be "abandoned" and have sat for years in an old mine is not possible.