This is good advice. Most clients don't care what you use as long as you can solve their business problems. You could use toothpicks and duct tape, and as long

This is good advice. Most clients don't care what you use as long as you can solve their business problems. You could use toothpicks and duct tape, and as long as their business problems get solved, they are happy. Also, they care more about the value of the solution to them than how many hours you spend doing it. If you spend an hour doing something that increases their revenue by $500k a year, they'd generally be quite happy handing over $20k for that hour's worth of work. You may find some that are extremely fussy and try to negotiate unrealistically low prices that would have you working for long hours. Those people do not understand the value of your work, and aren't worth working for. Focus on what results you can achieve rather than exactly how you will achieve them. When I want my pipe leak fixed, I don't care what tools or parts the plumber uses as long as it gets fixed.