Commenting on your post in 3 separate component parts ...[1] Aside from the cash injection where 100m is nowhere near enough.
[2] The big thing for me is, are ENIC willing to take a loss on selling the mediocre players we have? Because that's what we will get offered from any club willing to take them off us.
[3] If we want to improve the squad now, it means doing the hard thing and selling for a loss. Then investing whatever we get in sales plus injection to get better quality profile players.
1. £100m every year or so would be fantastic. PSR / FFP stops owners doing what Abramovich and Sheik Mansour did - pump in millions/ billions and spend it all on players. Drip feeding £50m in here and £100m in there means we maintain a healthy cash flow position and can keep spending as we have been for the last 3-4 years (where we have been one of the biggest spenders in world football). Importantly, ENIC are using their own money and not borrowing against the club.
2. Taking a loss on a player is a complicated topic. For example, we spent £50m on Richarlison 4 years ago. Due to player amortisation / depreciation, his fee was spread over 5 years on our books. So he is currently worth £10m as an asset from a regulatory perspective (PSR). If we sold him for £30m now we'd make a £20m profit and not a £20m loss. Next summer it would be pure profit. As Bentancur has renewed his contract, if we sold him next summer whatever we received would also be pure profit. I'd happily sell Richy, Johnson and Bentancur next summer if it meant we spent £200m on a CF, LWF and DCM.
3. I think we're almost at the point where our squad is pretty deep / good, but we need to add real first team ready quality. So instead of buying 7 players (for £30-£40m) we only need to buy 2-3 for £70-80m each). Same budget - less players. Next summer I really want a top CF, DCM and LWF. But to do that we need to make space and ensure we stay inside PSR. So we need to offload 3 or 4 players.