We do know that the new stand and development is £300m, that’s on the record. Liverpool’s new stand is reported at around £110m.
Last year we went from the semi final of the CL the year before to being the winners. That’s an additional 4-6m euros for reaching the final and an additional 20m for winning it, from what I can work out from UEFAs figures. FA Cup winners get 2m. It’s not close to 300m extra in revenue.
The new stand is not 300m. The new stand, hotel, offices, public f&b areas, shops, museum, corporate offerings and other facilities are a reported 300m. They will generate incredible revenue that will pay not only for the development itself but well beyond that too. This isn't some essential maintenance job to fix a leaky roof we are trying to save up for on player signings, it is a major investment into the club and is outwith the ffp threshold too.