Beck & Masten Buick GMC South

I scheduled an appointment to replace the AC Heat/Cool Actuator on the passenger side. The technician took 30 minutes to diagnose the problem and confirm that the actuator needed replacing. I have searched all youtube videos about replacing an A/C Heat/Cool actuator for my car, which is the 2011 Buick Enclave, and most videos show that it took less than 30 minutes to replace it. However Beck and Masten Service Representative, Kelly, told me this job needs about 8.8 hours of labor. Each hour of labor will cost me about $190. If we do that math right, replacing the A/C Heat/Cool Actuator for my Buick Enclave will cost me 9 hours of waiting and $1,700 and the part is $152. All in all, it will cost me roughly $2,000 and 9 hours of waiting. I couldn't believe what I heard at that point. So, I had to pay a $190 diagnosis fee and took my car home. I went to a local car repair shop and showed the mechanics the youtube video of how to replace it. It took him 25 minutes to get everything done. He charged me $80 for his labor. The part is $40 from Autozone. The total cost is $120. What is the difference between 9 hours of wait and $2000 in cost and 25 minutes of wait and $120 in cost? You can see the answer yourself. Thanks,