I was also in the automotive business for around 12 years. Most of it was spent running my own repair shops, one of which was an on-site auto service like YourMechanic. I had the same experience as the Carwash business. Not much money for too much trouble. Now, a repair garage did work out to be profitable because I'm a great mechanic. My work was always top nothch because I cared about my clients. But when things were going well my brother passed away. I had to close the shop one year later. Thats why I moved on to working on software full time. Decided to completely do away with the auto service industry, unless it has to do with software.