A point to consider. On game days, and when there are other activities surrounding the Packers, the city of Green Bay is required to furnish security at the facilities. On game day alone, upward of 100 police officers are on duty just at the stadium, along with an endless number of emergency medical personnel, ambulance, and at least one fire truck and crews. That does not include the additional personnel in the outreaching area, which nearly doubles that amount.
This is all in addition to the normal operations that all these services have at that given time. Since the majority of these people are working on overtime, the cost is enormous. It's also a cost absorbed by the city, as part of their lease agreement.
In addition to this, the city has had the sole responsibility for all maintenance that deals with the structure, or anything associated with the field itself. The only area of concern the Packers have had was the field itself. Even the underground heating system is the city's responsibility.
The State Legislature not only exempted them from property taxes for all the land they own, and will own, and their developments, but they also waived the 5% state tax they'd owe for income, because they are considered a non-profit organization.
The maintenance that the Packers say they will take over in 2030 does not include anything dealing with the integrity of the facility itself. It's more along the line of cosmetic maintenance and improvements.
According to information available, the Packers bring roughly $15 million dollars of business into the "region" on game days. Roughly half of that amount actually flows into Green Bay proper, and of that figure left, the Packer organization claims over half of the business through their various surrounding enterprises, and that percentage is going to grow as their brand grows around the stadium. That means the total business generated in GB, for the good of the city, is near $4 million dollars, but it is only generated into service industries, nothing appreciable for the average Green Bay businesses.
Sometimes dollar figures don't really tell the whole story. The windfall profits are good for people selling paraphernalia, renting hotel rooms, and restaurants and bars close to the stadium, but to the guy who owns a bar across town, or the people who own a candy store across town, none of it means anything.
Don't let service industry incomes fool you, because the majority of that money that's profits doesn't even stay in Green Bay. The majority goes to corporations that only own the businesses, and send the money to their home offices, far from Green Bay.