Apart from purchases of Asamoah & Isla, I don't think a 50m spend is unreasonable, if we get rid of a few players like matri, gio, dc, cut iaquinta off our wage bill and maybe get some cash for melo, martinez, ziegler and the goat too. Our income should be increased from CL amongst other things too coming off scudetto (11/12) season.
~50-60m = 20m SS (Muriel), 10-15 CB, Kolarov 10-15, Nainggolan 15 and Diakite and Llorente free.