After the Sussex couple officially step down as senior royals this week, they will have to figure out how to remove their earnings from the Royal Family, according to Mark Borkowski, a public relations and crisis consultant.
He said: "The problem is how do they get what we call clean money.
"Because there will be meat for the media if they are sponsored by a famous watch company and turn up at a royal event wearing that watch, or take a flight on a new airline route, or get hypnotised by some odd person who wants to be associated with them and they've got funny - not clean - money.
"So that's going to be the challenge, how they balance the money and the funding they want from the corporate world against still having the sheen of the royal family.
"It's a difficult thing to navigate, to keep credibility for everything you do."
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The formerly royal couple also have the option of working in the lecture circuit.
Harry could become an in-demand motivational speaker with his experience in the military and life in the public eye.
Meghan's may also revive her defunct lifestyle blog "The Tig".
It could be used to give her a platform to talk about everything that interests her.
This follows the landmark announcement that Meghan Markle will be narrating for Disney.
Her first role will be voicing a nature documentary about elephants titled ‘Elephant.'
Prince Harry was seen talking to Disney CEO Bob Iger at the London premiere of The Lion King.
It was reported that he was attempting to try and get his wife involved with Disney, saying: "You know, she does voice-overs."