The _____ ballroom is supposedly going to be 90,000 square feet? 90,000 square feet for a ballroom/dining room? The best that I've been able to determine is that the ballroom (the largest room) in Buckingham Palace is a mere 6,800 square feet (the state dining room in Windsor Castle is only around 5,400 square feet and the state dining room at 10 Downing Street is a mere 1,100 square feet). Is there actually a need for a room that's more than 10 times the size of the ballroom in Buckingham Palace? What is really being constructed?
(For a size comparison, the size of the fields for American football is less than 60,000 square feet.)