*sigh* The cheapest ticket is $75. I live a few hours away but I go to Dallas regularly. It is a relatively easy city to navigate no matter what area you are in. Cab companies are everywhere so it probably wouldn't be too difficult to get to and from the arena as long as you were within a few miles. They also have a public transit system that I have never used, but that I have heard is quite reliable.
A quick google search for hotels near that center took me to this:

http://maps.google.com/maps?sourceid...e-results&cd=1