I was paying £50 for wash/cut and blow dry at a curly specialist hairdresser until recently and used to go 3 times a year. After a disappointing experience last time when she made next to no effort to give any shape to my thin below shoulder length hair, I looked up cutting my own hair on YouTube and cut it myself into a-line bob. It looks genuinely lovely both blow dried into a sleek bob or air dried into my wavy/curly natural pattern.
With a few exceptions I’ve always coloured my own hair with box dyes or using professional colours and developers- it’s not rocket science, if you have understanding of the colour wheel and what different types of dyes can achieve.
My 13 old has a mid-waist hair which she lets me cut once every few months. We put some layers at the front and leave it blunt at the back. I use good quality hairdressers scissors and a comb and she’s really happy with the results. I keep asking her if she wants to get booked to have it cut professionally but she wouldn’t let anyone else touch her hair.