This move is not going to happen though, loan is kinda acceptable at this rate. Anyway this sounds really optimistic from Newcastle because first of all they need to make sure that they will stay in EPL next season otherwise I doubt that any of those top players would want to play in the Championship lol. Yeah they got all the money they can burn but unless they can make sure that they wont be relegated by the end of this season, they cant really sign any top players yet
Is it possible that they will be satisfied with relegation into championship? Then they can build a new team, probably win this league and get a lot of "regular earned" money to re-enter the Premier League. Even if new owners have an unlimited budget, they can spend only money earned by the club.
however, for top-class players, they will have to wait a while. Just remember when Man. City signed Robinho.