Messi seem willing to rejoin Barcelona this summer and it us only a matter of time before Barcelona begin steps to make Messi a Barcelona player again. Talking about the money, Messi had taken a pay-cut before to remain at the club, I'm confident he can make that sacrifice again for Barcelona been fully aware of the conditions of the club.
The big question about Messi joining Barcelona again next season will be is he going to be a regular starter for the club knowing too well that age is no longer on his side or will he accept to play from the bench instead of going to Saudi Arabia where he will have a big pay and still be a regular starter and key player to the team? Well this question will be answered by the decision Messi wants to make because it is very clear that he's no longer a PSG player so it will only take some time to know his next step but going back to his child hood club Barcelona to help the team won't be a bad idea because the team contributed to the better player that he is right now.
Concerning the pay cut that Messi initially accepted before moving back to PSG, the decision is left for him and the Barcelona president to decide but there's no way he won't be paid for his services even though the club is still in financial crisis he's got some bills to pay I think he's going to work on the pay cut to help his team if really he has the mind to play for Barcelona again.