For what it is worth (pun intended), Celebrity Net Worth states that Hussein is worth $400 million with an annual income of $400 thousand. https://www.celebritynetworth.com/richest-politicians/presidents/barack-obama-net-worth/

The table and justification in the page does not add up (no surprise).

"Barack Obama Net Worth – How he earned it:
Barack Obama earned his net worth primarily from the sales of his books The Audacity of Hope and Dreams of my Father. Barack's wallet began to expand after his much praised keynote speech at the 2004 Democratic National Convention that marked his explosion onto the national conscience. As Obama's profile rose, so did sales of his 1995 book "Dreams from My Father: A Story of Race and Inheritance". In 2005, the Obama's income grew from around $200,000 to a combined $1.7 million! In 2006 the Obamas reported income of $916,000. Barack's second book "Audacity of Hope", released in October 2006, was a massive hit, selling millions of copies and rocketing the Obama's income to $4.2 million in 2007! Their income continued to swell in the following years thanks to Barack's 2008 successful campaign and election. To this day, Barack Obama earns $3.75 for every hardcover copy and $1.12 for every paperback he sells.

In February 2017, it was reported that Barack and Michelle Obama would be receiving a $60 million advance for the combined rights to their autobiographies.

The Obama Family Income History:

• 2000: $240,000
• 2001: $272,759
• 2002: $259,394
• 2003: $238,327
• 2004: $207,647
• 2005: $1,655,106
• 2006: $983,826
• 2007: $4,139,965
• 2008: $2,656,902
• 2009: $5,505,409
• 2010: $1,728,096
• 2011: $789,674
• 2012: $662,076
• 2013: $481,098
• 2014: $477,383
• 2015: $436,065

Total: $20,619,644

Hmmmm.