doctors, lawyers, accountants, plumbers, electricians, mechanics have figured this out, i have faith that we can too. it's really not difficult.
please stop doing free tech work for people. there is something in the human condition which will cause them to be
1. ungrateful and upset with the results of your help
2. ironically, ask for more free work
3. blame you for their own fuckups
4. have set expectations that you'll do more of it on demand.
worst of all, you cheapen the entire concept of technology work. be the change you want to see in the world.