This is not easy, because currently Barcelona no longer has mega star players like Messi, Neymar and others. The only way for Barcelona to have good finances and solved all of their financial problem is to sell the club to a rich businessman, for example from Saudi Arabia. With this way, all of Barcelona debts can be paid off. However, if it only relies on sponsors, broadcasts, jerseys/merchandise, tickets, I don't think it will be enough to solve their financial problems in the near future.