I had a similar trip-redeye to Austin Texas and then a drive back to San Diego-staright thru. 20 odd hours of driving definitely gives you a feel for the VX.
The funniest part was the fuel light due to the gas cap. I did EXACTLY the same thing. I spent several hours STRESSED OUT because the used vehicle I just bought already had a problem, or so I thought.
I could just hear my wife busting my balls. She didn't understand why or how I could spend weeks online and on the phone for a vehicle, and then be willing to fly across the country for it.