It does not matter if you are paid hourly. Many people here can choose exactly how long they work for the same salary.
Your second point is, basically, that you like the work (on meal prep). But that is completely besides that point.
The way you should look at this is: would you agree to serve meals for $12 for a neighboor's family of 4? And I bet the answer is no, you would not.
This is about me and my meals though. My family is getting ripped off when I spend a sum of money on food that isn't very good. I've spent $40/person for meals that were as good as I could make at home in an hour, even though I'd be saving money doing the work myself it was still wroth it because I didn't feel like cooking.
If my neighbors decide that the meals they can buy are good enough that is their choice. I won't enforce "my good taste" on them. I find the value is not there.
Working hourly is a reasonable thing, though in my case I'm not. The other two are completely unrealistic. Working my job for that extra hour or two just leads to burnout.
When I'm at home preparing a meal my family is there, sometimes helping (watching your 5 year old cut something for the first time with a knife is a scary moment you don't want to miss), sometimes singing in the next room. Either way I make far more than $100/h when I make a meal for my family even though the only money exchanged is what I pay for groceries.