Hartford city officials recently unveiled a plan to build a new arena on the site of the XL Center . The idea is to hopefully have everything in place by 2013 , when Northland AEG , the current manager of the arena , turns control back over to the city . The cost of a new arena could be in the vicinity of $ 400 million , a hefty price tag for any city to pay . A less expensive alternative would be to go the way that the cities of Providence and Springfield did and spend a more modest amount ( about $ 80 million ) to simply give the XL Center a complete renovation .
According to the above context, answer the following question.
When is it so expensive ?


None of the above choices .