7mil would be enough and a competent manager would always find more options (player contracts, bonuses etc) signing with a 2 year delay is not an utter failure, as we still going to need him next year, but if we fail in the CL this year, because of a finisher option, like we did in copa last year, chances are that we will lose more than this 7mil investment (that would also help us secure the championship and maximise performance next year)