Don't agree that it's financially impossible. We have 175M Eur in new money on the balance sheet from a large bond deal, a large FFP surplus, and a debt to Value ratio of ~20%.
(Enterprise Value ~599M EUR in debt net of 223M EUR in Cash =~375M, and a market capitalization of 1,528B EUR, which = an enterprise value of ~1.9B EUR, and a net debt to capitalization ratio of 20%. Compare that to Roma at ~40%, or Porto at 73%. Manchester United is a 12.2%. If we end up at 30% for a couple of years, I'm not worried.
If we can reduce wages by shipping out Matuidi, Khedira, Perin, Mandzukic in addition to what we have already sold, it is very possible. With Higuain, Mandzukic, Ronaldo, Dybala, and Kean we have to much depth at CF, especially if we're playing a 4-3-3.
If it's a 4-3-1-2, I'd expect Mandzukic to go.
If it's a 4-3-3, I'd expect to Mandzukic and 1 of Higuain/Kean to go. I think Higuain will be hard to unload unfortunately.