In purely financial terms, you calculate the present value of the club's future estimated cashflows...like for any other business. And while I don't have the figures to hand, I'm reasonably confident that the answer = 0 (give or take).
Yet he is going to understandably want his cash back that he has ploughed in, thus I refer the honourable gentleman to my earlier answer namely we are probably stuck with him and he with us.....
I presume he’s had his pound of flesh. No doubt the golf course came from club funds. Then there is the unknown interest rate he has tagged on his loans to the club.
Talking about the golf course, I take it there’s absolutely no progress on the mythical training ground. Must be nigh on 2 years.
Edit: approaching 3 years
As a conservative estimate sems to suggest he has put c.£5m into the club, I cannot see where he can have extracted that so far so not sure we can suggest he has extracted a pound of flesh, more likely a couple of ounces at most.
As he is the sole owner of the club, club funds = Lee Power funds....