Emery is set to be announced as Arsenal’s next manager this week.
The former Paris Saint-Germain boss has overtaken Mikel Arteta as the Gunners’ No 1 choice to replace Arsene Wenger.
Arsenal had reportedly set a £50m transfer budget on this summer’s window.
However, Solhekol says that will be boosted by any player sales the club make.
And he claims Emery will be given the green light to make a huge signing if agreed on by the club’s new transfer hierarchy.
“I think what you have to say is that when it comes to finances, Arsenal are one of the leading clubs in the world,” Solhekol told Sky Sports News.
“If they want to sign a player for whatever amount of money it takes, they can sign that player.
“Of course we’ve been led to believe that the transfer budget that the new manager will been looking will be about £50m this summer.
“But you can add to that pot any proceeds they get from selling players.
“If Unai Emery says that he wants to buy players for £50m-60-70-80-90m, well Arsenal can afford to spend as much as it takes to get the players that he wants.
“But of course one of the things that Unai Emery will be well aware of, he has to fit into the management structure at Arsenal.
“He will have to work closely with the chief executive, the head of football relations and the head of recruitment.”