Liverpools anfield redevelopment cost one third of Everton’s new ground, a quarter of the price of Spurs stadium, and 10% of the proposed cost of Man Utd’s new build. They’re real world examples, in Sheffield we’d have to buy land, likely have multiple CPO’s, land preparation, planning, road infrastructure, public transport infrastructure and the build itself, just a new stadium would likely cost a billion quid all in, then if they’re wanting to turn it into a multi use complex much much more. New owners may see it as far more commercially viable. But the costs of both are worlds apart.