Does anyone here own a car detailing business? Have a few questions for you.

I don't but I buy and sell and detail my own vehicles. If you can add dent pulling and touch up paint to your service , particularly on older model cars, you'd be doing something not many people do.

There's a lot of completion out there in this business now because people are lazy and won't do it themselves.

Friend A has one for side job and he does mostly commercial fleets and makes a pretty penny because he holds those contracts and washes fleets all weekend. The hell with that but if that's something you'd be willing to do, then go for it.

Friend B strictly does detailing for small paint repairs and upholstery work. She makes a killing doing this because she beats every dealership in price by a large margin. If you could do this and advertise yourself well, you could end up doing pretty well. Barely any competition. I buy used cars and resell them and take all cars to her to fix minor things that cost me at most $1000 and I can then markup car a few extra thousand just by doing this.

To each your own, but if I ever got into this business, I would do Friend A or B. Not the regular hey bring your car to me to wash for $50. There's so many of those now a days.