I am able to do ground transport within 6 hours one way of DFW. I'm in the Dallas/Fort Worth area. I would be able to foster for up to a week for cats or a small dog. My days off are Wednesdays and Thursdays or early mornings and be back in DFW by noon any other day.
In July I did take 4 cats from TXK to LEX on an emergency basis. I also transported a cat from AUS to DAL that only took a few hours.
If it's on my weekend, I don't mind staying overnight. LaQuinta Inns is a very pet-friendly establishment.
To see my transports and my own cats, I have a pathetic looking site at http://mycatsrules.blogspot.com.
I have a pilot license, but I'm medically grounded indefinitely.