Harry already said that he couldn't afford a lot of players, so he may have to look towards cheaper targets, will be interesting to see who he does sign with limited funds, I doubt he'll dissapoint.
And also he has players to sell if he dont rate them O'Hara, Dos Santos, Taarabt....
By all accounts, Dos Santos did enough in the WC to convince Harry he's worth a shot up front this year. This is only what I've read on Spurs forums though so I can't vouch for the accuracy of it.