Why more Hollywood films don't take place at the National Aquarium in Baltimore

From the page on photography, where I hoped to find some images I could use in my column:

Fees for Commercial Shoots
The National Aquarium in Baltimore charges a fee of $4,000 for four hours of access to the building. You may also be responsible for additional charges including overtime staffing and security, insurance, and any union contract stipulations. In certain instances you may also be required to provide your own generator.

Did you catch the part about providing your own generator? Wow. I'm so overcome with the urge to film there I can't even tell you.