So, me, what would you prefer? I see as your options: building a new city hall for low eight figures; buying or renting* an existing, not-so-opulent structure for some small fraction of that cost; repurposing an existing city-owned complex - such as Jacobs Gallery; employing Rick Steers' idea of a 'virtual' City Hall; becoming absorbed by Springfield, thus obviating the need for any City Hall.

* You can get a lot of productive use of a building by paying a fraction of its cost in rent every year. And, hey, the City already rents space in other buildings around town for its offices.