If you want to see what multi-millionaires can do to a club, look at Man Utd.
They bought everything without investing a penny of their own money, award themselves huge wads of cash every year while leaving the club servicing huge debts at high interest rates - debts that are secured by the clubs assets; not by the owners' assets.
I'm not saying that is what will happen here, but there are ways to invest in a club and there are "ways" to invest in a club.
As I've said before, the most important thing for me is the exit plan. What is going to happen when the investor leaves, runs out of money or gets bored? Are they going to take their money and run, will they sell to a property developer or will they leave a self-sustaining (or at least healthy) infrastructure behind.