If Kevin McCabe wants to get his investment back AND a profit, all at once, he will need to wait until we are in the Premiership.
Let's face it, what would it take to buy the club, the ground,etc., in other words "everything", £60 million? £70 million?
Then you would need to assemble a squad that gets you out of League 1 at the first go, so let's say (just for arguments sake), that you buy a new starting 11 and keep the best of the rest on the bench, etc. Would that be 11 players at £1M each? or £500k each? (probably a mix, as we are looking to get out in one season), let's say it splits 50/50, so say 6 players at £500k and 5 at £1M, so £8m in total.
That is potentially £78 million that someone will have to spend to get hold of SUFC in total, and get out in one attempt.
Even if it just takes 11 players at £250k each (the figure online today for Sam Morsy), that is £2.75 million, so £72.5M (or £62.5M or £52.5M depending on the cost of the club).
Once in the Championship, you need to be spending more to get a team to keep you in the top half, and then more to get to the Premiership.
The big "catch 22" as far as I see it, is that we are a very big club in our League, in fact the biggest. We are a "sleeping giant", to use that old phrase, and one with potential, but to maximise the potential you have to be in the Premiership, and that takes money and back to square one.
Maybe I am over complicating/over simplifying or just missing certain points, but that is pretty much what I (if I was the investor) would be looking at.