I think Moyes lack of experience in managing a big club will hurt them in the transfer market at least in the beginning. He thought he could just automatically go for big name players that he could never get at Everton but doesn't seem to know how to go about it. He tried to get Thiago & failed, tried to get Cesc & failed, etc. Now he's going after Ander Herrera (who isn't even that big a name) & from the looks of things so far probably won't get him either.
This is all of course if you believe the press rumors.