It's not worth much at all when you consider the overheads. Doubling your wage bill, promotion bonuses circa 10-20 million, mandatory ground improvements if it's your first promotion . New contracts/ new signings on numbers that eat up your parachute money when relegated. We should also consider that it's the biggest Championship loss makers with the biggest chance of promotion. So it's a bit of a high stakes gamble with the promotion money paying back the large initial stake. Most lose their stake.
To stand a chance of retaining Prem revenues the bar is now Forest. A gargantuan private capital investment from your owner as the Sky money barely touches the sides these days .
What Sky has done, above all, is make footballers, football staff and agents incredibly wealthy. The benefits haven't passed on to the consumer. Tickets and merchandise and TV viewing is more expensive, not less.