I wouldnt give him 5m for two years. This is a Scottie Pippen & Bulls situation, the fact that Chiello has been underpaid for years and we have overpaid other guys doesnt mean we have to overpay him now when he's clearly in decline. He shouldve asked for more 5 years ago not now when he's on the brink of retirement and we're in deep shit financially.
Even if we sell Demiral, Im all for making due with what we have - Bonu, De Ligt, Danilo, Dragusin and Rugani, for what we pay them Bonu and de Ligt should be able to cover most of the games