I'll stick with Discount Tire for my tire needs. They have gotten me out of a lot of jams with nails in tires for no charge repairs, and they always have a decent house brand tire for my econo-boxes at a decent price (and full warranty).
However I will say this. In San Antonio there are quite a few Mobile mechanic places around. I hired one when I just moved into my house and didn't have my tools accessible to put rotors and pads on my wife's scion. $75 fee and he did a decent job, not as picky as I would be but it worked on an economy car.
There are also several 100 percent mobile shops dedicated to doing brakes. The guy next door had them replace rotors and pads all the way around on his Lexus SUV, and they seemed to be a rather polished setup. Arrived in sprinter van with compressor, and all tools on board. Soft lift jacks, and covers to protect the car and the driveway from dirt or damage.
When I lived in Austin there was a service that would come and put gas in your car, but I think that is more dedicated to fleet use, and makes less sense for anyone to use it.