Whereas most Hollywood productions of the day took little more than a month to shoot, "Wings" took approximately nine months to complete in total. Although Wellman was generating spectacular aerial footage and making Hollywood film history, Paramount expressed concerns with the cost of production and expanding budget. They sent an executive to San Antonio to complain to Wellman who swiftly told him that he had two options, "a trip home or a trip to the hospital". According to biographer Frank T. Thompson, Wellman approached producer David O. Selznick regarding a contract predicament asking him what he should do to which Selznick replied, "Just keep your mouth shut. You've got 'em where it hurts." Otto Kahn, the financier bankrolling the production, arrived on set as Wellman was filming the St-Mihiel battle sequence, inadvertently disrupted Wellman's detonation timings, and caused several extras to be seriously injured. Wellman loudly and profanely ordered Kahn off the set. That evening, Kahn visited Wellman in his hotel room, told him he was impressed with his direction, and he could have whatever he needed to finish the picture.