I'm a season ticket holder in Hartford, and I can tell you that the arena needs way more than the $30 mil "upgrade". The XL Center has outlived it's useful life, and requires a $200+ mil upgrade or needs to be rebuilt...we have about 20 open threads on that item
Second, the population of metropolitan Hartford (actual city) is less than 100,000. Add in all of the surrounding suburbs (West Hartford, Glastonbury, Wethersfield, Rocky Hill etc) and you may come close to 1 mil, but those towns don't share anything with the city