is it really that impossible though?
we're talking 6-7m for the pair maybe?
bearing in mind there is no defensive talent in our youth team - pasa is closer to a DM like Benassi than anything, Donkor is years away from being ready, Paramatti is also YEARS away from being ready...
I could honestly see a double swoop like this being perfect, along with JJ & Rano, for fixing our defensive issues for a long time to come. Androelli is clearly not a starting solution, he'll be the Cordoba/Materazzi for the last few years, and is the Silvestre replacement. If we release Samuel, then we need at least one defender capable of competing with JJ/Rano, and we can make up the rest of the CBs from squad depth (JJ,Rano,Andreolli, newguy/Chivu, 1 of Huerta+Lichno)
Castillo I agree seems a bit harder, but at the same time, we are clearly after him and I think Moratti has a lot of faith in Angeloni - as witnessed by blowing 2.75m on a complete unknown - so I dont think tyhe idea of investing, say, 10-12m in the trio is IMPOSSIBLE.
& TBH with us signing Kovacic, it seems harder to get Quintero - though I'd love to see Kovacic playing behind Quintero - so if at all, why not blow the Quintero money on 3 young prospects?