It is already said that Hakimi is preparing to move to PSG for a price around €60m. And they won't sell only him of course. I hope that they don't sell any of Lukaku-Martinez duo. They were really incredible last season. And it would be too hard to fill their place I believe.
From what their board said, they need approximately 80 million Euros to cover the debt. Hakimi will cover most of that so it will probably be a few more fringe players that will be sold.
However, Inter is in the Champions league next season and their team lacks both depth and quality to play 2 competitions in parallel. They would be smart to sell a few players they could replace (like De Vrij and Eriksen) because they will need to buy a few players as well. Hakimi is their only natural right winger and he'll need to be replaced for sure.
Whoever becomes their next manager, he'll have his hands full.