One thing I can guarantee with Ratcliffe is he won't put in any more than he can possibly avoid doing. Everybody who has ever worked for or with him, and I'm talking about at exec level not just factory floor employees, has said he's a tight arsed git who won't spend.
He's good a raising finance though, usually with other peoples money, like the not insignificant amount he got paid from the government for distributing covid masks, and the nice wedge he got for the Ineos factory which he pocketed and then set up in France instead, similar to what James Dyson did.
Personally I think he'll be looking for a way out when the novelty wears off and he realises how expensive it is to run an ailing football club.