The biggest mistake of new (or expanding) museums is to optimistically build their plan to open the doors, rather than conservatively to account for sustainability. There are too many examples of museums opening or expanding only to run into financial difficulties very soon after.
Here at the Philadelphia Sports Hall of Fame we have put together budgets for expansion based on various projected square footage numbers. Each one contains a line item for 3 years of operating expense. This OpEx amount allows the museum to operate for 3 years without assuming a single nickel of new revenue.
Granted, this is very conservative approach but we feel it is in the best interests of our donors, sponsors, supporters & other constituents.
My 2 ¢
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Ken Avallon
Philadelphia Sports Hall of Fame
kavallon@phillyhall.net------------------------------