We're not literally selling/releasing 20 players.
If we go down there will be a fair few players far too good for the Championship that will end up staying whether they like it or not. We've got way more quality and squad depth than any other recently-relegated team and also, while it will fuck us financially, we'll be nowhere near as desperate as the likes of Leicester who were already walking a fine line with PSR and basically had no choice but to sell everyone.
Let's say we need to raise 150-200m through sales (already WAY more than any other recently relegated team) we can probably get that from like 4-5 players: Romero, VdV, Kudus, Porro etc. Naturally we'll also let a bunch of other players leave cos of wages, contracts ending, they're kicking off...but beyond a certain point we're just actively harming ourselves by letting players leave.
To come back up we need a squad that can boss the championship, and to do that we still need a strong enough mix of young talent (Gray, Bergvall, Moore, etc) and some legit experience too.
Anyone who thinks we're literally gonna sell every international player in the squad will be in for a shock. There will be some big names stuck here if we go down.