Billionaire entrepreneur and founder of SpaceX Elon Musk speaks at the 68th International Astronautical Congress 2017 in Adelaide on September 29, 2017. Musk said his company SpaceX has begun serious work on the BFR Rocket as he plans an Interplanetary Transport System. / AFP PHOTO / PETER PARKS (Photo credit should read PETER PARKS/AFP/Getty Images)

Saudi Arabia’s sovereign wealth fund would be the main source of money for Tesla CEO Elon Musk’s grand plan to take the company private, but the deal isn’t done yet, Musk disclosed in a blog on Monday.The fund…

Photo Credit: AFP/Getty Images