Great Horse for Experienced Rider

Good horse for an experienced rider. Is afraid of cars, but will not take off or buck. He just walks in circles till the car has gone by. Has a fast gait. Selling because I will not be able to learn barrells with him. My 8 year old daughter can ride him fine, and she only has 1 and a half years riding experience. He tends to be bossy with an inexperienced rider. He is also somewhat dominant when around other horses during feeding time. The only reason Im selling him is because I am just getting into horses and did not know that a Tennessee Walker cant run barrells.