How did the Denver Broncos get their name?

The cost of creating a stadium at that elevation for the Chiefs, Raiders, Dolphins, Cowboys and Buccaneers was probably considered, but it surely left no money left over for staff, players or vendors. It was a great Public relations idea and a potential architetctural World Wonder, but the Elevator costs staggerred the mind and where would the Tail Gate Parties be held? Denver was fortunate enough to have a chunk or grass that already was close to that elevation and the NFL gave it a chance.