Is the Astro turf surface still installed? The Astrodome is an unused jewel for a major team sports that I bet probably nobody ever thought off. It will probably take just a minor upgrade of the field surface and field seating configuration to accomendate it (no, it's not soccer). My guestimate it would take $1-2 Million to update the Astrodome and another $8-10 Million expansion team price tag (or moving an existing team) plus credit guarantees for at least 3 seasons of play.