Uber is recommended since downtown is so close. If you have a car, parking options include Brazos Garage ($15 – $18 for the day) or 2008 Whitis Ave, Austin, TX 78705 ($12 – $15/day).
Lots of good options in Austin. Anything downtown will be a 5 minute Uber to the business school, Hotwire has great last minute deals. There are also many good AirBnB options.