Beast the situation is completely different. Perez back then paid the buy-out clause of Figo, then signed 29 year old Zidane for 65 M from a team that always sell their ageing players for good money and replaces them with other ones (they sold Baggio and replaced him with Del Piero, they sold Zidane and Inzaghi and bought Nedved, Trezeguet and Buffon, Vieri was sold to Atletico and they got Inzaghi etc.). Back then your only competitors on the transfer market were Milan and maybe Barcelona.
Now you have Chelsea, Man City, Man Utd, Liverpool, Inter, Barcelona, Milan and even if your name is sound and you're the most successful team in Europe, the competition will increase the transfer values and you'll have to pay really big money so that you can have Kaka or Ronaldo. For every your 50M bid Man City will double the price, I'm not surprised that Milan tried to sell Kaka to Man City and not Real M, first of all because you're their main rivals in Europe not only on the pitch but outside it too. They also sell shirts and are trying to attract as many fans as the could get.
Perez signed one big name player per a season and now he is saying that he can sign 5-6 for one summer, that is very optimistic and far from the true. You have to offer them unrealistic salaries as well, at least 12M euro per a season for Kaka and Ronaldo without the bonuses, and 6-7M for Fabregas, Alonso, Ribery and considering the big salaries of Casillas, Raul and the rest from your team who also earn something of the sort, you wage budget may reach something like 100 M, highly unrealistic.
There is something else, Beast. The players already realise their market value and if you want Kaka and Ronaldo you have to offer them 50% of it. This is why Ronaldo want to join Real, because at the moment United hold all his rights, so he doesn't get anything the articles with his image.
And we are living in times of recession and the banks are not willing to grant loans and you don't have any other sport base for selling
so you have to wait and hope someone to sign Robben/Sneijder/Van der Vaart. I read that Perez is hoping to get at least 100M euro from the deals but he certainly is mad if he thinks that there are enough stupid clubs to pay 25M for injury prone players...
So as Galactico said, you better go for good players like Diego, silva, Villa or Gourkuff rather than spending all the cash on Ronaldo and Kaka.