@Carla378
Oh Carla, I am so sorry you have found yourself in this position and all I can hope is that another Airbnb host in Dallas will try and help you in some way.
Unfortunately there is not much Airbnb can do because you have done a deal outside the Airbnb system, you have agreed to pay the host direct. Airbnb do not operate this way!
If the situation is as you say I would find the hosts Airbnb profile, if he indeed has one, and click the small flag you will find under his profile name with the field that says....Report this user!
That will bring it to the attention of Airbnb's Trust and Safety team and you can explain what has happened to you and Airbnb will take the appropriate action against this host.
I can't speak for other hosts but, we are a good community Carla and if only this had happened in my part of the world I would have been only to happy to help you, even if it meant making a room available in the main house but, it would have been through the Airbnb system.
Can you please keep us informed how things turn out for you.
Cheers.....Rob