SpaceX plans to send humans around the moon in 2018. Can they pull it off?

February 27, 2017 —Two private citizens have booked a trip around the moon scheduled for 2018, according to a SpaceX announcement Monday afternoon.
Yes, you read that right. The commercial spaceflight company that has yet to fly any crewed missions into space plans to send two non-astronauts beyond Earth's orbit next year. Is that really possible?
http://www.csmonitor.com/Science/Spacebound/2017/0227/SpaceX-plans-to-send-humans-around-the-moon-in-2018.-Can-they-pull-it-off?cmpid=ema:nws:Daily%2520Newsletter%2520%2802-28-2017%29&utm_source=Sailthru&utm_medium=email&utm_campaign=20170228_Newsletter:%20Daily&utm_term=Daily
Article courtesy of The Christian Science Monitor by Eva Botkin-Kowaski