The problem with the Igloo/the Pens' finances is simple:
No luxury boxes.
There's more to that, and its all Howard Baldwin's fault. All of it.
When this incompetent businessman bought the team, he didn't have enough to take over the Arena rights, so those were sold to SMG for $24 million. The deal Baldwin made was a disgrace, SMG had the Penguins pay an outrageous $6.8 million in anual rent and they took a huge chunk of revenues from parking, concession, advertising and as said, whatever luxery suites the building had.
Of course, there was also Baldwin spending $130 million from private investors to renovate the current building instead of using it towards building a new one.