Upgrading a Qatar-donated 747 into a new Air Force One would take a large sum of money and years to complete, aviation experts said.

President Donald Trump reportedly is ready to accept a luxury Boeing 747-8 jumbo jet as a gift from the ruling family of Qatar during his trip to the

Described as a "palace in the sky," this 13-year-old aircraft is valued at approximately $400 million. The jet's opulent configuration and potential as the most valuable gift ever extended to the U.S.