It seems in this season Saudi teams are making trouble for the European teams and they are making players ask for higher amounts of money because they can get better offers from these Arabian teams, Lukaku can definitely be a good player for Milan but considering their financial situation I don't think if Milan can pay enough to Lukaku.
If Lukaku insist on playing with Inter Milan then Chelsea will end by letting him go there, they don't have many options. There is 2 players that left Chelsea to go to Saudi Arabia teams but the amount gained from them aren't that big since one go there as free agent.
For Lukaku, his contract expires in 2026, there isn't a rush from Chelsea side to get ride from him with winning some money so indeed another loan is very possible.
Actually, Chelsea wants to release Romelu Lukaku in the transfer market this season. And Chelsea offered Inter Milan to buy Lukaku from Chelsea. But Inter Milan seems to only want to bring in Lukaku on loan only. And Chelsea doesn't seem to want that because the Chelsea club really wants to let him go this season. Because it looks like the Chelsea club have big plans if they have collected enough money in the transfer market this time.
reportedly the Chelsea coach is eyeing one of the Barcelona players.
And it turns out that there is news that AC Milan is in fact negotiating regarding Lukaku. Because AC Milan also just lost Zlatan Ibrahimovic who decided to hang up his boots starting this season. He decided to retire early. So that AC Milan is currently hunting for players to replace the vacant position.
Actually, if Lukaku accepts an offer from one of the Arab clubs, he will get a very high salary. But Lukaku still insists on playing in European clubs, especially at Inter Milan.