The geezer who owns Forest is a zillionaire.
If he wants to spend his money on building his team into th next European superpower, I don't see what's wrong with it.
As long as the money isn't a loan which could jeopardise the long term future of the club.
If a billionaire with no heirs decides to leave his entire wealth to a Championship football team when he dies, would the team be allowed to accept the money under FFP?