Go up north and purchase or lease Kamp motor speedway. That would be my first choice. The track was always pretty good.
Then there is vermillion county speedway, terre haute, and there is a lot of fairgrounds with unused 1/4 mile tracks.

Here is an awesome track directory.

http://www.onedirt.com/features/dirt-tracks-across-america-the-ultimate-dirt-track-guide/

If you click the state you want near the bottom of the page it will bring up google maps with icons everywhere there is, or has ever been, a race track. Very cool page.