Buy a Politician. It has a long history of success. Or run for office yourself. Small town elections often have very low participation. Also, whatever your political leanings, if you want to win an Election in the Austin area, claim to be a (D). Bastrop, (R), but Wells Branch? (D).
TX is a "Home Rule" state, meaning the local governments have incredible autonomy over zoning and permitted use, with almost no interference or oversight by the State. While there have been some legislative efforts to carve out space at the State level in local zoning (excluding HOAs) to allow chickens, those bills have gone to committee to die in each of at least the last four or five sessions. I expect that won't change in the near future.
...and as someone who spent a decade+ just outside Austin before (relatively) recently moving, who has watched friends and coworkers abandon the Austin area as soon as they can afford to do so, I assure you - whatever Austin may claim on paper - they are NOT friendly from a Code Enforcement standpoint. The city is rapidly going to the dumps, and taking its suburban neighbors with it.