We rarely spend big and in the past 10 years Chelsea have spent double and City not too far behind. Our squad is in need of a massive overhaul and investment in the best of the ready made available targets so I don't see anything wrong if both Vidal and Sanchez are available and we spend what ever is necessary to land those targets. My guess would be €40-45 million each. That's roughly £65-70m of our apparently £140 warchest (taken away 60 for Shaw/Herrera).
Leaves us with 70 million to invest in a CB and 1-2 young players for future development (Depay could be possible one)
We could easily make up 30-40 million on selling players alone, take that from the 'war chest' we'd only be spending 150-160m to go from midtable players to a world class/ potential world class XI.
The Muppet XI
De Gea
Rafa, Jones, Hummels, Shaw
Vidal, Herrera
Sanchez, Mata, Januzaj
RVP
Subs : Rooney, Carrick, James Wilson, Depay, Kagawa, Smalling..etc