First: What you do going in will be what you get coming out. In other words, don't cut corners! Whether for pleasure or profit it doesn't matter. Same as when you're prepping a car for paint. You can buy the most expensive paint on the planet, but if the prep work isn't great going in then the paint will reflect EXACTLY what is underneath.
Second: Expensive doesn't mean it's good.
This certainly holds true for products. Check the most regretted thread for that one.

Duragloss for instance is one that most guys that know it will swear is great product, yet if you're shopping just on price you'd think "It just can't be that good." Oh but it IS!
The third thing: Is that it that the most expensive shop doesn't mean it's the best shop, whether detailing, repairing, even house painting for that matter. Price alone isn't a bellwether as to if one guy is *that much* better, (if any) than another. Doesn't have to apply ONLY to detailers. Plenty of GREAT detailers and qualified techs can be found that are not charging $100 an hour, or $75 for that matter. It's about the guys passion for his work. Bet in a matter of minutes here and say on another closely linked forum you can find two guys, doing the same job, and one charges twice what the other does. Both I'm willing to bet can give you excellent work, and likely if you didn't know which one was doing what you'd never know the difference. Just as one or another may throw in little extras just because that's the way he does things. You do what you have to do to pay the bills. Yet even Mike says he doesn't do this for the money anymore. What's the old saying about doing something you love? Jus' sayin'..... :dunno: