I would give 30m, 35m tops. The market is crazy though, Insigne and Verratti would cost an arm and a leg today, (like 60-80m).
I think Bernardeschi will be good for us. He's got good vision, passing and technique and he can score goals. Good in the build up as well. Downsides: pace and decision making aren't that good. He also tries to do too much on his own, Max will have to fix this for sure. I wouldn't expect him to become WC but he could become very good.