Co-owner George Gillett will travel to Saudi Arabia on Tuesday to hold further talks with the Saudi Royal.
"His Highness's shareholding could go from anything from nought to 100%," Barry Didato told BBC Sport.
"But he cannot be seen as a solution to the debt or problems in the existing relationship between the owners."
The relationship between Gillett and his co-owner Tom Hicks has been strained for some time.
Each has a 50% stake in the Premier League club, yet neither can sell shares without the other's approval.
Prince Faisal, whose full name is Prince Faisal bin Fahd bin Abdullah al-Saud, has only been holding talks with Gillett so far.
And Didato - director of strategic investments for the Saudi prince's investment vehicle, F6 - said the pair had established a "chemistry and shared vision".
The fractious relationship between Liverpool's American co-owners is a concern, though.
"His Highness would not want to get involved in (the problems between the pair), he is not a marriage counsellor," Didato said.
He added that the Saudis has concerns about the high debt levels at the club.
"The debt has to be at a manageable level before Prince Faisal would invest and the current level is high," he said.
"He cannot be looked to as someone who is going to clean up the balance sheet - Gillett has to deal with this."
Didato said Prince Faisal was flexible about how big a stake he might take at Anfield.
"His Highness does not need to be a majority shareholder and a takeover has not been his focus," he said.
Last week Hicks and Gillett issued a statement in response to reports that Prince Faisal was ready to bid for a 50% stake in Liverpool.
The duo admitted they were looking to attract new investment to the club but added: "The process is at an early stage, there is no agreement with any party and reports to the contrary are wholly inaccurate."
F6 has already signed a memorandum of understanding with Liverpool which will lead to the creation of football academies in North Africa and the Middle East and the deal also covered the possible establishment of a Nascar franchise in the area.
Didato insisted Prince Faisal's involvement with Liverpool could only be a good thing for the club and its fans.
"His Highness is an extraordinary man who is passionate about football," he said. "He has a tremendous respect for Liverpool and their fan base.
"He only wants what is best for them and is one of those rare breeds of investor who is in it for the long haul."
