Don't forget the wider picture. The financial future is uncertain because of Brexit. Many companies have stopped investment in new projects because of potential unpredictably in trading after Brexit. Just take steel, for example. A stadium uses a lot of steel. Scunthorpe receives about 20,000 tonnes of iron ore a day, and a similar amount of coal. Both raw materials come from a mix of countries, Poland, Russia, US, Canada, Brazil and other South American countries, with whom we have trade agreements through the EU until Brexit. If no deal, no trade agreements - what then?
The steelworks are already hit by US trade sanctions, with British Steel losing 500 jobs with many, I would think, at Scunthorpe.
Who, in their right mind, would be going ahead with the build of a large stadium at this time when financing will be particularly difficult and the future so uncertain. I would wait for the situation to be come clearer.