60-70 mill and 6-7 mil for Isco and a little less for Gotze. Saving a 5 mills here and there doesn't matter as long as we are getting the right quality of players.
A window that only had Isco, Tielemans, Khedira, and Jovetic would have been better for me than the one we actually did.
Zaza, Sandro, Lemina, Hernanes, Mandzukic, were unnecessary.
It's strange that people think these top players won't come to Italy. That's not the case at all. Their clubs won't sell for the low fees we offer, and the players aren't convinced to come here by the low wages we offer. Napoli managed to convince Higuain to come by paying him more than anyone at Juventus makes, and paying a higher transfer fee than we've yet been willing to pay.
Like you say, 60-70 mil and 6-7 mil wages and we probably could have purchased Isco in the summer. And with the sale of Vidal taken into account, we should have been purchasing a player such as Isco, Gotze, Oscar... even if it cost us 60-70 mil and broke our "wage cap"...
If we're not at some point willing to break the wage cap, and spend a little more on the occasional established star, we're never going to join the ranks of the elite, and we're never going to have the consistent high earnings from both late stage Champion's League runs, and better marketability due to increased star power in the team. We're not going to get lucky with Pirlo, Tevez, Pogba style deals forever. We're seeing that this year.