I think you are understating decent business practice somewhat, but your point about needing investors is spot on. The reality is though that a rich investor on their own will not guarantee success, and that is where the good clubs step away from the poor clubs.
I suspect Wigan, Leeds and a couple of other top clubs have much less of a shareholder investment requirement than some of the weaker clubs who have been reliant on investors, like Hull KR and London.
I think it is unfair to say that Warrington, Wigan, Leeds, Saints etc are in a stronger position than some other clubs purely due to 'pot luck'.
Koukash is finding it difficult now, even with a nice ground and plenty of money knocking around, and we have seen in many other sports that money does not equal success.
We can't however forget that this is the business of sport, and the balance needs to be right.
On the rich man they either walk through the door or they don't.
On the grounds they either come off or they don't.
I'm sure your right that clubs have some hard work to do to court the rich man, and have some hard work to do to swing a good deal for the ground, but Wakey were unlucky that Ted Richardson packed in and York Court stuffed them.