if this building is still usable, turn it into a shelter. you have thousands of dogs running the streets. and i am sure you could find a few good people to work there.
Why not have your cake and eat it too. It is multi story. The rodeo says they need a new arena. The Texans need more parking. We want a green space. A museum about the dome would be great. Why not turn the top floor into a huge green space like discovery green. With real trees a water feature. A biosphere. Below that put your arena, parking and a museum. It would generate revenue if you charged a small fee to visit the museum and spend time at the park. You could put restaurants in there maybe even have a ride or two. This would attract people and give us a leg up on future events like the superbowl which definitely generates revenue.