Here's the problem, you can't use past accounting as an argument for viability as all those businesses & events have moved on.
You need future accounting from businesses & events that want to come in as the land is.
As I said, Speedway needs help, you're flogging a dead horse going alone.
Peterborough's situation isn't comparable to Coventry & Oxford as they have the multi-use of the facility.
With the land vastness of the EoES, Peterborough cannot argue the viability of the stadium & 'fictional' accounting without other businesses on board.
Or the other option is a simple one, find a multi millionaire to buy the land from EEAS