As nice as it would be, 17 mil would probably only get you Lukaku's right leg.
Think £20m would secure him actually. Don't think Mourinho fancies him.
But I don't think Lukaku would want it, not before we qualified for the Champions League anyway. We'd want a five year contract and he'd want a chance to play on the biggest stage.
If you think about it, has Lukaku done enough to entice the clubs who have £20m to splash on a striker to throw that money on him? I personally don't think so. He's a talent but it's still a massive gamble for the money.