My Subie is an awesome car. It has a black leather interior with CD player, satellite radio, and a moonroof. It has a 4 cylinder engine, automatic transmission, a trailer hitch, and has gotten 30 MPG on a good day. The dog in the picture is not for rent (not necessarily), but yours is welcome to come with you. I have some additional stuff that you can rent for an extra charge as well:
24/7 parking garage pass in downtown Austin.
A big roof-top cargo basket.
Car seats/ booster seats
A hitch mount cargo basket.
A hitch mount bike rack for two bikes.
If the mileage limits don't work for you, let me know, maybe we can work something out.
Also, ask me about my Airbnb room for rent if you need a place to stay in Austin as well.