I completely understand why 99% would not touch it. The championship is stupid money and investment is far more likely to translate into ongoing heavy losses.
RedBull however already have the players available to them to be able to loan them to us at no extra cost to themselves. That should be enough to see us return to the premiership, so a 150m rise in club value alone (also massive income generation), as well as their loan players increasing in value due to exposure of English game.
If that isn't enough, they have an existing global player & staff knowledge to invest with as certain as you can be in football to see a profitable return.
It's simply using resources they have already acquired and using an existing template.
Seems a no brainer to me so I'm sure I'm missing lots of the pieces.