In installments? it's quite ridiculous for Barcelona class, it's better not at all in my opinion than forcing yourself which has a bad possibility later for the team and it will be very dangerous in the future, their problems are not over and want to add new problems just because they are ambitious to get Dani Olmo into the squad for next season.
This is the Barcelona we can see now with the problems they still face. I also think they should not force themselves to bring in players if they are not able to, because it will bring new problems especially if they pay in installments from the players they want to bring in. They have to look into their pockets, how much money they have and whether it will be enough to buy players and also whether they can afford their salaries. They have to be aware of that even though I know they have to be better because their rivals are already ahead of them.
Keep in mind that they still have problems, don't let them create new problems just because they want to look stronger. I think they have to show that with the squad they have and the problems they are facing now they are still a very strong club. Management must be aware of their current capabilities.
Of course, Barcelona management must think about all decisions in targeting their targets because if they force themselves, of course the other option is that they have to get an injection of funds by selling old players. Yes, that is the right solution rather than having to pay in installments to the players they buy and also regarding salaries, of course this will make them have to think twice before completing their targets.
Barcelona is certainly hampered by finances in the transfer market, therefore some of their targets have turned to other teams because other teams have healthy finances in the competition to buy players. Of course, their rivals are stronger and have sufficient quality and that is why Barcelona is trying to balance this by targeting lots of quality players in the transfer market.