From my perspective I think the club is managed within the following structure:
The overall budget for the club is allocated from SISU level.
The allocation of cost centre budgets is determined by the Senior management team....which will be Fisher Chair, MR for playing side & player support services & DB for admin, academy and facilities.
MR will allocate the budget as he sees fit.
As for negotiating player transfers, etc. I expect specialist agents are used.
Finally, in terms of bids for players - I wonder if Sheaf was the subject of a bid? Regarding O'Hare I would guess that there is a clause in his contract allowing a club to discuss a transfer if it reached a certain level. The fee suggested in the CET could well have been planted by an agent, who'll be looking for some commission from a transfer.
Hamer - if he doesn't sign a new contract the club would need to sell this summer, as losing him for £0 would be reckless.
Gyo - as the clubs emerge from a year of trading with crowds back in the grounds. I expect transfer fees to return to pre-pandemic levels. As he's on track for 20 goals that would rate him at £8 - £10m+ depending on competition for his signature.